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HomeMy WebLinkAboutEX_06_RP_CUP_TIA_241112_v1Traffic Impact Analysis RENTON RFA #16 – FIRE STATION Prepared for: TCA Architecture August 2024 Prepared by: 12131 113th Avenue NE, Suite 203 Kirkland, WA 98034-7120 Phone: 425-821-3665 www.transpogroup.com 1.23360.00 © 2024 Transpo Group EXHIBIT 6 RECEIVED 12/17/2024 JDing PLANNING DIVISION Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 0 Table of Contents Introduction ............................................................................................................................... 1 Project Description ................................................................................................................. 1 Study Scope and Study Area ................................................................................................. 1 Existing & Future Without-Project Conditions ...................................................................... 4 Transportation System ........................................................................................................... 4 Traffic Volumes ...................................................................................................................... 4 Traffic Operations .................................................................................................................. 7 Traffic Safety .......................................................................................................................... 8 Project Impacts ......................................................................................................................... 9 Trip Generation ...................................................................................................................... 9 Trip Distribution and Assignment ......................................................................................... 10 Future With-Project Traffic Volumes .................................................................................... 12 Future With-Project Traffic Operations ................................................................................ 14 Site Access Analysis ............................................................................................................ 14 Sight Distance ...................................................................................................................... 15 Parking Demand Analysis .................................................................................................... 20 Mitigation ................................................................................................................................. 21 Findings and Recommendations .......................................................................................... 22 Appendix Appendix A: Traffic Counts Appendix B: LOS Definitions Appendix C: LOS Worksheets Appendix D: Detailed Existing RFA Station #16 Observations Figures Figure 1. Site Vicinity and Study Intersection ..................................................................... 2 Figure 2. Preliminary Site Plan ........................................................................................... 3 Figure 3. Existing and Future (2026) Without-Project Peak Hour Traffic Volumes ............ 6 Figure 4. Weekday Peak Hour Project Trip Distribution and Assignment ........................ 11 Figure 5. Future (2026) With-Project Weekday Peak Hour Traffic Volumes .................... 13 Figure 6. Northwestern Driveway along SE 128th Street Entering and Stopping Sight Distance ............................................................................................................. 17 Figure 7. Northeastern Driveway along SE 128th Street Entering and Stopping Sight Distance ............................................................................................................. 18 Figure 8. Driveway along 158th Avenue SE Entering and Stopping Sight Distance........ 19 Tables Table 1. Existing and Future Without-Project Weekday Peak Hour 158th Ave SE/SE 128th St Intersection Operations ......................................................................... 7 Table 2. Weekday Peak Hour Trip Generation ................................................................. 9 Table 3. Traffic Volume Impacts at the 158th Ave SE/SE 128th St Study Intersection .. 12 Table 4. Future (2026) Weekday Peak Hour 158th Ave SE/SE 128th St Intersection Operations ......................................................................................................... 14 Table 5. Future (2026) Site Access Weekday Peak Hour Operations ............................ 15 Table 6. Driveway Sight Distance Summary (SE 128th St Posted Speed Limit of 45 mph) ........................................................................................................................... 16 Table 7. Driveway Sight Distance Summary (SE 128th St Posted Speed Limit of 35 mph) ........................................................................................................................... 20 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 1 Introduction This traffic impact analysis (TIA) identifies potential transportation-related impacts associated with the Renton RFA #16 Fire Station relocation in Renton. Project Description The proposed project will relocate the existing Renton RFA #16 Fire Station approximately 0.25 miles northeast of the current site. The new Fire Station site is located south of SE 128th Street and east of 158th Avenue SE in Renton. The site vicinity, including locations of the existing and proposed fire stations, is shown on Figure 1. The proposed fire station is designed to provide pull through access such that the fire apparatus vehicles will enter the station from the south and exit to the north. In addition to the primary fire station being relocated to this site, the site proposes to include an approximately 10,000 square feet (sf) maintenance building. Access to the site is proposed via three driveways, with two located along SE 128th Street and one along 158th Avenue SE, each of which are described below. • Northwestern Driveway – Fire apparatus will use the northwestern driveway along SE 128th Street as an outbound only driveway (inbound access via the Southern Driveway). The driveway width is 60 feet to provide improved outbound maneuverability for the fire apparatus. • Northeastern Driveway – The northeastern driveway is provided along SE 128th Street and provides access to the fire station public entry as well as includes surface parking. • Southern Driveway – This driveway along 158th Avenue SE provides inbound access for the fire apparatus (exiting via the northwestern driveway) and also provides access to both the maintenance building and parking for the station staff. The non-fire apparatus vehicles would both enter and exit via the southern driveway. Figure 2 illustrates the site plan, site driveway locations, and on-site surface parking. The proposed project is anticipated to be built and fully occupied by 2026. Study Scope and Study Area The scope of the analysis is consistent with the City of Renton’s Traffic Impact Analysis Policy Guidelines for New Developments (2023). The stop-controlled intersection of 158th Avenue SE/SE 128th Street stop-controlled intersection directly adjacent to the proposed project site was included for analysis during both the AM and PM peak hours. Note that the project impact at the off-site intersection (described in greater detail in the Future Traffic Volumes section below) is less than 5 percent, such that no additional intersections were included in the analysis. In addition to the off-site study intersection, the three site access driveways along SE 128th Street and 158th Avenue SE were evaluated under the future with-project conditions. The analysis includes a review of existing conditions in the vicinity of the project site, including the transportation network, planned improvements, existing and future without-project peak hour traffic volumes, traffic operations, and traffic safety. Future with-project conditions are evaluated by adding site-generated traffic to future without-project volumes. Future without and with-project conditions are compared to identify the impacts the proposed project has on the surrounding transportation system. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Site Vicinity and Study Intersections Renton RFA #16 - Fire Station FIGURE 1 Mar 21, 2024 - 11:32am lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA 16.dwg Layout: Site Vicinity and Study Ints Proposed Site Existing Site 1 4 2 3 Study Intersection LEGEND X Site AccessX SE 128TH ST 15 6 T H A V E S E 15 5 T H A V E S E 15 6 T H A V E S E 15 8 T H A V E S E 16 0 T H A V E S E NE 4TH ST SE 132ND ST Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Preliminary Site Plan Renton RFA #16 - Fire Station FIGURE 2 Mar 21, 2024 - 10:07am lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA 16.dwg Layout: A Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 4 Existing & Future Without-Project Conditions This section describes both existing and future (2026) without-project conditions within the identified study area. Study area characteristics are provided for the transportation system, planned improvements, existing and future forecasted without-project traffic volumes, traffic operations, and traffic safety. Transportation System The following sections describe the existing transportation system within the vicinity of the proposed project and anticipated changes resulting from planned improvements. Existing As described above, the project is located southeast of the 158th Avenue SE/SE 128th Street intersection in Renton. SE 128th Street is classified by the City of Renton as a principal arterial with 4 lanes of travel and a speed limit of 45 mph in the vicinity of the project site. 158th Avenue SE is classified as a local road with 2 lanes of travel. The speed limit is 25 mph. No sidewalks are provided in the immediate vicinity of the project site although wide painted shoulders are present along both sides of SE 128th Street. Sidewalks are present along the north side of SE 128th Street beginning approximately 500 feet west of the site and 575 feet east of the site. No dedicated bicycle facilities are provided in the vicinity of the project site although wide painted shoulders are present along SE 128th Street. Transit service in the study area is provided by King County Metro. The nearest bus stop to the project site is located at the intersection of 156th Avenue SE and SE 128th Street (approximately 575 feet west of the project site) and is served by Route 111. Route 111 operates on weekdays with 8 roundtrips in the morning from 5:15 AM to 8:50 AM and 8 roundtrips in the evening from 3:30 PM to 7:15 PM. Route 111 provides connection between Lake Kathleen, Maplewood, Renton highlands, Kennydale, Newport Heights and Downtown Seattle. Planned Improvements Based on a review of the City of Renton’s Six-Year (2023-2028) Transportation Improvement Program and King County’s Adopted Six-Year Capital Improvement Program (2021-2026), there is one improvement project, NE 4th St Corridor Improvements, that is planned in the vicinity of the project site as described below. This project involves six phases of improvements along NE 4th Street between Jefferson Avenue NE and Duvall Avenue NE. Improvements include rechannelization, traffic signal modifications and possible transit priority signal treatments and queue jumps. The project also includes a new signal at the intersection of NE 4th Street and Bremerton Avenue NE. The final timeline of the project is not yet finalized. Although this project does not result in changes to the study intersection, street improvements are required by the City as a part of the project’s development to extend the NE 4th Street Corridor improvements along the proposed site’s frontage. As a part of the project, SE 128th Street will be widened to include 4 lanes of travel with a planting strip and sidewalk along the roadway. Traffic Volumes Existing and future without-project traffic volumes at the 158th Avenue SE/SE 128th Street intersection are described below. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 5 Existing Existing weekday AM (7 to 9 a.m.) and PM (4 to 6 p.m.) peak period traffic counts were collected at the one off-site study intersection in March 2024 and are included in Appendix A. Volumes are rounded to the nearest 5 vehicles to account for the daily fluctuations in traffic volumes. Figure 3 illustrates the existing weekday peak hour traffic volumes at the off-site study intersection. Future Without-Project Traffic Volumes Future (2026) without-project traffic volumes are developed using background traffic growth as there were no planned “pipeline” developments identified in the vicinity of the proposed project site. An annual growth rate of 2.0 percent per year was applied to the existing traffic volumes consistent with previously approved studies in the vicinity of the project site. The annual growth rate was applied to the existing study intersection traffic volumes to estimate 2026 horizon year background traffic growth. The forecast future 2026 without-project weekday peak hour traffic volumes are shown on Figure 3. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Existing and Future (2026) Peak Hour Traffic Volumes Renton RFA #16 - Fire Station FIGURE 3 Apr 01, 2024 - 10:13am lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA 16.dwg Layout: Existing Vols Site 1 4 2 3 Study Intersection LEGEND X Site AccessX SE 128TH ST 15 6 T H A V E S E 15 6 T H A V E S E 15 8 T H A V E S E 16 0 T H A V E S E NE 4TH ST (X)Weekday AM Peak Hour Traffic Volumes X Weekday PM Peak Hour Traffic Volumes 158th Ave SE SE 128th St (0) 5 (960) 795 (10) 35 (10) 10 (15) 10 (5) 5 (515) 915 (0) 5 1 Existing Peak Hour Traffic Volumes 158th Ave SE SE 128th St (0) 5 (1,000) 825 (10) 35 (10) 10 (15) 10 (5) 5 (535) 950 (0) 5 1 Future (2026) Peak Hour Traffic Volumes Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 7 Traffic Operations The following section summarizes the traffic operations for existing and future (2026) without- project conditions for the off-site study intersection of 158th Avenue SE/SE 128th Street. The operational characteristics of an intersection are determined by calculating the intersection level of service (LOS). At the unsignalized side-street, stop-controlled intersection, LOS is measured by the average delay on the worst-movement of the intersection. Traffic operations and average vehicle delay for an intersection can be described qualitatively with a range of levels of service (LOS A through LOS F), with LOS A indicating free-flowing traffic and LOS F indicating extreme congestion and long vehicle delays. Appendix B contains a detailed explanation of LOS criteria and definitions. According to the City of Renton Comprehensive Plan, the citywide level of service standard for all roadways within the study area is LOS D. Weekday peak hour traffic operations for existing and future without-project conditions were evaluated at the study intersection based on the procedures identified in the Highway Capacity Manual (HCM 7th ed.) and using Synchro 12. Synchro 12 is a software program that uses HCM methodology to evaluate intersection LOS and average vehicle delays. Analysis parameters such as lane channelization were maintained for future 2026 without-project conditions consistent with existing conditions. Results for the existing and future without-project operations analyses are summarized in Table 1. Detailed LOS worksheets for the existing and future without-project analysis are included in Appendix C. Table 1. Existing and Future Without-Project Weekday Peak Hour 158th Ave SE/SE 128th St Intersection Operations Existing 2026 Without-Project Peak Hour LOS1 Delay2 WM3 LOS Delay WM3 AM Peak Hour C 23 NB C 25 NB PM Peak Hour D 28 NB D 30 NB 1. Level of Service (A – F) as defined by the 7th Edition Highway Capacity Manual (HCM), Transportation Research Board. 2. Average delay per vehicle in seconds. 3. Worst movement reported for unsignalized intersection where NB = northbound. Table 1 shows that under existing conditions, the study intersection operates at LOS C during the weekday AM peak hour and LOS D during the weekday PM peak hour, meeting the City’s LOS D standard. With the addition of background growth under future without-project conditions, the study intersection is expected to continue operating at the same LOS as under existing conditions, with increases in delay of 2 seconds or less. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 8 Traffic Safety The three most recent years of collision records (January 1, 2020, to December 31, 2022) provided by the Washington State Department of Transportation (WSDOT) were reviewed within the study area to identify existing traffic safety issues at the study intersection and along the roadway segments surrounding the site. The 158th Avenue SE/SE 128th Street intersection had no reported collisions during the three- year review period nor were there any reported collisions along the site frontage on 158th Avenue SE. One collision was reported on SE 128th Street along the site frontage which was caused by a vehicle colliding with a fixed object and resulted in minor injuries. Based on the review of existing collisions in the study area, no patterns of safety concerns were identified. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 9 Project Impacts This section of the report documents project-generated impacts within the study area. First, peak hour traffic volumes are estimated, distributed, and assigned to adjacent roadways and intersections within the study area. Next, future (2026) traffic volumes including project traffic are developed and the potential impact to traffic volumes and traffic operations are identified. Trip Generation Trip generation for the project was estimated for both the relocated fire station as well as the maintenance facility. Each are described below. Relocated Fire Station The proposed fire station is planned to be operated consistently with the existing station which includes 4 platoons of 3 people (a total of 12 persons) with 24-hour shifts. The shift change occurs daily at 8 a.m. with arrivals and departures occurring between the typical weekday AM peak period (7-9 a.m.). Given the consistent operations of the proposed station with the existing station, weekday AM and PM peak hour trip generation for the proposed station was estimated based observations at the existing RFA Station #16. The observations were conducted at the existing fire station in March 2024 during the weekday AM (7-9 a.m.) and PM peak period (4-6 p.m.).1 The observations were validated based on an estimate per Institute of Transportation Engineers (ITE) Trip Generation Manual (11th Edition, 2021) as available. ITE’s Fire and Rescue Station (LU #575) was assumed for the proposed use based on the number of employees (i.e., 3 employees per 24-hour shift). Note that no data is provided by ITE during the weekday AM peak for a Fire and Rescue Station (LU #575). A comparison of the weekday AM and PM peak hour trip generation estimated for the proposed project is provided in Table 2. The detailed trip generation calculations are included in Appendix E. Table 2. Weekday Peak Hour Trip Generation (Fire Station) AM Peak Hour Trips PM Peak Hour Trips Method In Out Total In Out Total Observations2 3 5 8 1 1 2 ITE’s Fire and Rescue Station (LU #575)1 - - - 0 1 1 1. Institute of Transportation Engineers (ITE) Trip Generation Manual (11th Edition, 2021) average trip rate per employee. 2. Station #16 existing fire station in March 2024 during the weekday AM and PM peak period (7-9 a.m. and 4-6 p.m.). The observations showed 8 trips occurring during the weekday AM peak hour and 2 trips during the weekday PM peak hour. The trip types that occurred during the observations included: • AM Peak Hour – There were approximately 7 trips associated with fire station employees, and one trip associated with the public observed during the AM peak hour. No fire apparatus trips were observed during the AM peak hour. • PM Peak Hour – Both trips were associated with a fire apparatus, one departing and then returning during the peak hour. Note that trips of a fire station are highly dependent on calls, but the observed trip types were used for driveway assignment purposes for the proposed station. The high AM trip generation corresponds with the operations of the station with shift change occurring during the AM peak 1 March 7, 2024. The detailed observations are included in Appendix D. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 10 period. The comparison to ITE shows the observations were greater than estimated per ITE based on the number of staff. Added Maintenace Facility The fire station maintenance facility will be utilized for normal maintenance and repair of the departments heavy vehicle fire equipment. There will be two mechanics that will be on site daily that will service vehicles. Given the number of vehicles in the department and number of mechanics, it is anticipated that at most two vehicles per day would be serviced generating very little vehicular traffic. This would likely generate two to three trips in the PM peak hour associated with employees leaving the site and possibly the departure of a repaired vehicle. For purposes of the analysis, a conservative approach was taken by utilizing ITE’s General Light Industrial (110) land use to estimate the peak hour trip generation. A comparison of the weekday AM and PM peak hour trip generation estimated for the proposed project is provided in Table 3. The detailed trip generation calculations are included in Appendix E. Table 3. Weekday Peak Hour Trip Generation (Fire Station) Size AM Peak Hour Trips PM Peak Hour Trips Land Use1 In Out Total In Out Total General Light Industrial (LU #110) 10,000 sf 6 1 7 1 6 7 Note: sf = square feet. 1. Institute of Transportation Engineers (ITE) Trip Generation Manual (11th Edition, 2021) average trip rate per employee. As shown in Table 3, the maintenance facility was assumed to conservatively generate 7 trips during the weekday AM and PM peak hours. These weekday peak hour trip estimates are conservative relative to the anticipated use of the maintenance building as described above. Overall, the project would be estimated to generate up to 15 trips during the weekday AM peak hour and 9 trips during the weekday PM peak hour. Trip Distribution and Assignment Trip distribution patterns for the proposed uses to and from the site were based on existing travel patterns identified in the area. The trip distribution for the proposed project is shown on Figure 4. The net new peak hour project vehicle trips were assigned within the study area based on distribution for the proposed project as well as assigned to the driveways consistent with the observed trip types and the corresponding project driveways. Note that although no fire apparatus activity was observed during the weekday AM peak hour, 1 inbound and 1 outbound trip was assumed for a conservative analysis. The resulting project trip assignment is shown on Figure 4 for both the weekday AM and PM peak hours. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Weekday Peak Hour Project Trip Distribution and Assignment Renton RFA #16 - Fire Station FIGURE 5 May 30, 2024 - 8:51am lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA 16.dwg Layout: Distribution&Assignment Site 1 4 2 3 SE 128TH ST 15 6 T H A V E S E 15 6 T H A V E S E 15 8 T H A V E S E 16 0 T H A V E S E NE 4TH ST Study Intersection Site Access X Weekday PM Peak Hour Project Trips Trip Distribution LEGEND X X XX% (X)Weekday AM Peak Hour Project Trips 50% 50% (4) 2 (4) 4 (2) 3 (5) 0 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 12 Future With-Project Traffic Volumes Site-generated weekday peak hour traffic volumes were added to the future without-project traffic volumes at the 158th Avenue SE/SE 128th Street intersection. The resulting future (2026) with-project peak hour traffic volumes are illustrated on Figure 5. Table 4 summarizes the anticipated increase in total entering traffic at the 158th Avenue SE/SE 128th Street intersection as well as the percent of future with-project traffic volumes attributable to the proposed project. Table 4. Traffic Volume Impacts at the 158th Ave SE/SE 128th St Study Intersection Peak Hour 2026 Future Without-Project TEV1 Project Trips TEV 2026 Future With-Project TEV Percent Share AM Peak Hour 1,575 14 1,589 0.9% PM Peak Hour 1,845 9 1,854 0.5% 1. Total Entering Vehicles As shown in Table 4, the project share in future (2026) traffic volumes is estimated to be less than 1 percent at the 158th Avenue SE/SE 128th Street intersection during the weekday AM and PM peak hours. Traffic volumes may fluctuate day-to-day by 5 to 10 percent; therefore, the increase in traffic as a result of the proposed project is less than daily fluctuation. Note that the percent impact is less than the City’s 5 percent requirement for studying intersection impacts but was included in the analysis given its proximity to the project site. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Future (2026) With-Project Peak Hour Traffic Volumes Renton RFA #16 - Fire Station FIGURE 6 May 30, 2024 - 8:54am lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA 16.dwg Layout: Future With-Project Vols Site 1 4 2 3 Study Intersection LEGEND X Site AccessX SE 128TH ST 15 6 T H A V E S E 15 6 T H A V E S E 15 8 T H A V E S E 16 0 T H A V E S E NE 4TH ST (X)Weekday AM Peak Hour Traffic Volumes X Weekday PM Peak Hour Traffic Volumes 158th Ave SE SE 128th St (0) 5 (1,000) 825 (14) 37 (13) 13 (17) 13 (9) 5 (536) 951 (0) 5 (1,017) 843 (1) 1 (0) 0 (544) 955 NW Access Driveway SE 128th St NE Access Driveway SE 128th St (1,017) 843 (0) 0 (1) 0 (544) 955 158th Ave SE W Access Driveway 20 (25) (5) 6 (8) 2 (15) 40 1 2 3 4 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 14 Future With-Project Traffic Operations Future (2026) with-project operations were evaluated for the weekday AM and PM peak hours at the158th Ave SE/SE 128th St intersection. Intersection LOS was calculated using the methodology described previously. Analysis parameters such as lane channelization were assumed to be consistent for the future without- and with-project conditions. The without- project conditions are compared to the with-project conditions to understand the potential traffic impacts of the proposed project. Table 5 summarizes the 2026 without- and with-project intersection operations for the weekday peak hours. LOS worksheets are included in Appendix C. Table 5. Future (2026) Weekday Peak Hour 158th Ave SE/SE 128th St Intersection Operations 2026 Without-Project 2026 With-Project Peak Period LOS1 Delay2 WM3 LOS Delay WM AM Peak Hour C 25 NB D 27 NB PM Peak Hour D 30 NB D 31 NB 1. Level of Service (A-F) as defined by the 7th Edition Highway Capacity Manual (HCM), Transportation Research Board. 2. Average delay per vehicle in seconds. 3. Worst movement (WM) reported for side-street stop-controlled intersection where NB = northbound. As shown in Table 5, with the addition of project traffic, the off-site study intersection is anticipated to worsen by 2 seconds delay and operate at the at LOS D during the weekday AM peak hour and continue operating at LOS D during the weekday PM peak hour with 1 second of added delay. The study intersection meets the City’s LOS D standard in both the weekday AM and PM peak hours with the addition of project traffic. Site Access Analysis The proposed project includes three site access points, with two along SE 128th Street and one via 158th Avenue SE (see Figure 2). The anticipated functions and users of each driveway are identified below. • Northwestern Driveway – Fire apparatus will use the northwestern driveway along SE 128th Street as an outbound only driveway (inbound access via the Southern Driveway). The driveway width is 60 feet to provide improved outbound maneuverability for the fire apparatus. • Northeastern Driveway – The northeastern driveway is provided along SE 128th Street and provides access to the fire station public entry as well as includes surface parking. • Southern Driveway – This driveway along 158th Avenue SE provides inbound access for the fire apparatus (exiting via the northwestern driveway) and also provides access to both the maintenance building and parking for the station staff. The non-fire apparatus vehicles would both enter and exit via the southern driveway. All accesses are proposed to be side-street stop controlled. The traffic assignment to each driveway as identified above was assumed to be consistent with observations with the exception of the inclusion of a fire apparatus during the AM peak hour as none was observed, consistent with methodology as described above. The traffic operations at the site driveways along SE 128th Street and 158th Avenue NE were evaluated under future with-project conditions for the weekday AM and PM peak hours and are summarized in Table 6. The operational analysis was consistent with the methodology described above for the off-site intersections. LOS worksheets are included in Appendix C. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 15 Table 6. Future (2026) Site Access Weekday Peak Hour Operations Intersection AM Peak Hour PM Peak Hour LOS1 Delay2 WM3 LOS1 Delay2 WM3 A. NW Driveway/SE 128th St F 66 NB F 70 NB B. NE Driveway/SE 128th St B 11 WB A 0 NB C. W Driveway/158th Ave SE A 8 WB A 8 WB 1. Level of Service (A-F) as defined by the 7th Edition Highway Capacity Manual (HCM), Transportation Research Board. 2. Average delay per vehicle in seconds. 3. Worst movement (WM) reported for side-street stop-controlled intersection where NB = northbound and WB = westbound. As shown above in Table 6, the northeast and western site access driveways along SE 128th Street and 158th Avenue SE, respectively, are anticipated to operate within the City of Renton’s standards at LOS B or better during both the AM and PM peak hours. The northwest driveway along SE 128th Street (the outbound fire apparatus driveway) is shown to operate at LOS F during both the AM and PM peak hours. The contributing assumptions to the LOS F conditions during both the weekday AM and PM peak hours are identified below. • Trips - A single outbound fire apparatus departing the site to the west (a northbound left-turn). This is consistent with the observations during the PM peak hour, but more than observed in the AM peak hour. A trip of a fire apparatus during the peak hour is call dependent. There could be more or less. • Assignment – The trip of the fire apparatus was assumed to be outbound to the west (a northbound left-turn) which provides the more conservative assumptions as it increases the conflicts along the vehicles along the adjacent street. • High volumes along SE 128th Street – There are forecast to be approximately 1,600 and 1,800 vehicles in the AM and PM peak hours, respectively conflicting with the outbound left-turn fire apparatus. These conflicting vehicles are reduced to approximately 1,000 and 800 vehicles during the AM and PM peak hours if a trip to the east (a northbound right-turn). • Heavy Vehicle – The operations reflect 100% heavy vehicle adjustment at the driveway, consistent with the assumed fire apparatus outbound from the site. Without the heavy vehicle adjustment, the operations would be improved to LOS D conditions during both the weekday AM and PM peak hours. • Emergency Vehicle Indications – The operations do not reflect any priority given to the fire apparatus associated with the vehicle’s emergency vehicle indicators. The assumptions above are not necessarily typical conditions but are assumed to generally reflect worse case conditions. This approach was taken as response times are critical for the proposed fire station and the associated fire apparatus. Sight Distance Sight distance was measured in the field for the three site access driveways along SE 128th Street and 158th Avenue SE per AASHTO2 standards. Stopping sight distance and intersection sight distance (referred to as entering sight distance) are defined as follows: • Stopping sight distance – Stopping sight distance is the distance drivers need to be able to see an object on the roadway ahead and bring their vehicle to complete stop before colliding with the object. • Entering Sight Distance – “At…minor approach stop controlled intersections, sight distance along the intersecting roadway should be sufficient to permit the driver on the 2 American Association of State Highway and Transportation Officials (AASHTO) A Policy on Geometric Design of Highways and Streets (2018, 7th Ed). Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 16 minor road to anticipate and avoid potential collisions. If the available sight distance for an entering or crossing vehicle is at least equal to the appropriate stopping sight distance for the major road, then drivers have sufficient sight distance to anticipate and avoid collisions. However, in some cases, a major-road vehicle may need to slow or stop to accommodate the maneuver by a minor road vehicle. To enhance traffic operations, intersection sight distances that exceed stopping sight distances are desirable along the major road.” Per AASHTO section 9.5.1. The entering and stopping distance requirements for each driveway per the AASHTO standards are summarized in Table 7 below. This analysis reflects the current posted speed limits along the project frontages. Table 7. Driveway Sight Distance Summary (SE 128th St Posted Speed Limit of 45 mph) Driveway Posted Speed Limit Design Speed1 Entering Sight Distance2 Stopping Sight Distance3 Recommended Available Met? Required Available Met? A. NW DW/SE 128th St 45 50 555 ft 500 ft No5 455 ft3 / 399 ft4 455 ft Yes B. NE DW/SE 128th St 45 50 555 ft 475 ft No5 455 ft3 / 399 ft4 531 ft Yes C. W DW/158th Ave SE 25 30 335 ft 240 ft No6 200 ft 250 ft Yes 1. Design speed per AASHTO which assumes a design speed of 5 mph greater than the posted speed limit or a design speed of 20 to 45 mph for the road class. 2. Entering sight distance identified per AASHTO Table 9-7. An object height of 3.5 ft and set back of 14.5 ft is assumed. 3. Adjusted for 4% grade downgrade when approaching the driveways from the west traveling EB. 4. Adjusted for 4% upgrade when approaching the driveways from the east, traveling WB. 5. Obstructed by crest of vertical curve along SE 128th Street. 6. Obstructed by vegetation. Figures 6 through 8 illustrate the entering sight distance and stopping sight distance at each of the three site access driveways. Field observations show that the required stopping sight distance was met at all three site access driveways. The entering sight distance is available to the east of both driveways along SE 128th Street, and to the north of the site driveway along 158th Avenue SE. The limited entering sight distance to the west of both site access driveways along SE 128th Street is due to the crest of the roadways vertical curve causing limited visibility. The limited entering sight distance to the south of the site access driveway along 158th Avenue SE is due to the presence of thick shrubs along the east side of 158th Avenue SE. As identified above, the stopping sight distance, the distance for safety, is met. The entering sight distance, the distance to not impact operations, is limited for an approach of each driveway; however, the available entering sight distance at each location exceeds the required stopping sight distance, such that, per AASTHO, the drivers have sufficient sight distance to anticipate and avoid collisions. The reduced available entering sight distance may result in some limited delay to drivers along the major roadways. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Northwestern Driveway along SE 128th Street Entering and Stopping Sight Distance Renton RFA #16 - Fire Station FIGURE 6 Apr 19, 2024 - 2:22pm lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA_Sight Distance Graphics.dwg Layout: NW Dwy SD Stopping Sight Distance Entering Sight Distance Required Stopping Sight Distance (Available) LEGEND Note: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 50 mph, 5 mph above the posted speed limit, adjusted for 4% grade. © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Required Entering Sight Distance LEGEND Note: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 50 mph, 5 mph above the posted speed limit. Entering Sight Distance is measured 14.5 feet back from the edge of the traveled way. Available Entering Sight Distance Recommended Entering Sight Distance LEGEND Available Entering Sight Distance Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Northeastern Driveway along SE 128th Street Entering and Stopping Sight Distance Renton RFA #16 - Fire Station FIGURE 7 Apr 19, 2024 - 2:33pm lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA_Sight Distance Graphics.dwg Layout: NE Dwy SD Stopping Sight Distance Entering Sight Distance Required Stopping Sight Distance (Available) LEGEND Note: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 50 mph, 5 mph above the posted speed limit, adjusted for 4% grade. © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Required Entering Sight Distance LEGEND Note: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 50 mph, 5 mph above the posted speed limit. Entering Sight Distance is measured 14.5 feet back from the edge of the traveled way. Available Entering Sight Distance Recommended Entering Sight Distance LEGEND Available Entering Sight Distance Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Driveway along 158th Avenue SE Entering and Stopping Sight Distance Renton RFA #16 - Fire Station FIGURE 8 Apr 19, 2024 - 2:45pm lilyh M:\23\1.23360.00 - Renton RFA #16 - Fire station\Graphics\DWG\Renton RFA_Sight Distance Graphics.dwg Layout: 158th Ave Dwy SD Stopping Sight Distance Entering Sight Distance Required Stopping Sight Distance (Available) LEGENDNote: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 30 mph, 5 mph above the posted speed limit. © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Reccomended Entering Sight Distance LEGENDNote: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 30 mph, 5 mph above the posted speed limit. Entering Sight Distance is measured 14.5 feet back from the edge of the traveled way. Available Entering Sight Distance Recommended Entering Sight Distance LEGEND Available Entering Sight Distance © 2024 Microsoft Corporation © 2024 Maxar ©CNES (2024) Distribution Airbus DS Required Stopping Sight Distance (Available) LEGENDNote: Based on AASHTO A Policy of Geometric Design of Highways and Streets, based on a design speed of 30 mph, 5 mph above the posted speed limit. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 20 An option to consider improving entering sight distance along SE 128th Street would be to adjust the speed limit. Currently, the posted speed limit along SE 128th Street transitions from 35 mph to 45 mph approximately 245 feet west3 of the site. Given the entering sight distance limitations associated with the vertical hill along SE 128th Street in the vicinity of the project, reducing the posted speed limit to 35 mph along the frontage to match the 35-mph zone east of the site would allow the recommended entering sight distance to be met. The sight distances associated with the reduced speeds are summarized in Table 7 below. Table 8. Driveway Sight Distance Summary (SE 128th St Posted Speed Limit of 35 mph) Driveway Posted Speed Limit Design Speed1 Entering Sight Distance2 Stopping Sight Distance3 Recommended Available Met? Required Available Met? A. NW DW/SE 128th St 35 40 445 ft 500 ft Yes 321 ft3 / 285 ft4 455 ft Yes B. NE DW/SE 128th St 35 40 445 ft 475 ft Yes 321 ft3 / 285 ft4 531 ft Yes 1. Design speed per AASHTO which assumes a design speed of 5 mph greater than the posted speed limit or a design speed of 20 to 45 mph for the road class. 2. Entering sight distance identified per AASHTO Table 9-7. An object height of 3.5 ft and set back of 14.5 ft is assumed. 3. Adjusted for 4% grade downgrade when approaching the driveways from the west traveling EB. 4. Adjusted for 4% upgrade when approaching the driveways from the east, traveling WB. As shown in the table, by shifting the transition of the speed limit to east of the site, both the entering and stopping sight distances for the driveways along SE 128th Street are met. Note that roadway widening and frontage improvements along SE 128th Street will occur as a part of project construction, as required by the city. It is anticipated that this project will not result in any changes in the sight distance findings above given the challenges are associated with the vertical curve and not roadway width. Parking Demand Analysis The project includes a parking supply of 20 vehicles as shown in the site plan on Figure 2. Parking demand for the project was reviewed for the proposed relocated fire station based on observations with review of the proposed maintenance facility per ITE, consistent with the methodology for trip generation as summarized above. Relocated Fire Station – Parking demand for non-fire apparatus vehicles was observed at the existing Renton RFA #16 Fire Station during both the AM and PM peak periods. As discussed with staff, staffing at the existing and proposed Renton RFA Fire Station #16 will remain unchanged with the relocation. There are 3 people working per 24-hour shift, with a total of 12 members of the Station rotating shifts. Shift change is at 8 am each day, with those coming on shift arriving around 7:30 am, and those ending their shift leaving the station around 8:30 am. The maximum parking demand observed was 6 vehicles. Added Maintenance Facility – The parking demand of the maintenance facility was estimated per ITE’s Parking Generation Manual (6th Edition) assuming the general Light Industrial (LU #110) land use resulting in a weekday demand of 7 vehicles for the maintenance building. As noted above, this provides a conservative estimate as the maintenance facility will be utilized for normal maintenance and repair of the departments heavy vehicle fire equipment, such that the parking is anticipated to be limited to mechanics (anticipated to be 2 vehicles) with the larger vehicles being serviced within the building. Including the parking demand for both the fire station per the observations of 6 vehicles and the conservative demand for the maintenance facility of 7 vehicles, the total parking demand would be up to 13 vehicles; therefore, the on-site parking supply of 20 stalls is adequate to accommodate the demand. 3 Posted speed limit signage located approximately 380 feet west of the site along westbound on SE 128th Street, and approximately 110 feet west of the site along eastbound SE 128th Street. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 21 Mitigation As shown above, the off-site study intersection and project driveways are forecast to operate acceptably with the exception of the northwest driveway along SE 128th Street which provides outbound access for the fire apparatus. Numerous factors were identified that influence the operations of the driveway and the operations as reflected are generally conservative as no reduced delay for the fire apparatus was assumed associated with the vehicle’s siren or light indications to drivers along the adjacent roadway. This approach was taken as response times are critical for the proposed fire station and the associated fire apparatus. Additionally, the above sight distance evaluation shows that stopping sight distance was met at all three driveways as well as entering sight distance for one approach of each driveway. The recommended entering sight distance of the eastbound approaches of the driveways along SE 128th Street and northbound approach of the driveway along 158th Avenue SE driveways were limited. The available entering sight distance of the limited approaches exceed the stopping sight distance such that the distance required for safety is met; however, there may be added delay to vehicles along the adjacent roadways due to the reduced recommended entering sight distance being available. AASHTO identifies “to enhance traffic operations, intersection [entering] sight distances that exceed stopping sight distances are desirable along the major road.” Based on the above findings, the following measures are recommended to be considered and coordinated with the City: • Shift the speed limit transition along SE 128th Street to extend the 35 mph condition through the site frontage. This would result in the recommended entering sight distance being met along SE 128th Street. No forecast impacts to operations or delay. • With the planned widening along SE 128th Street with the project along the frontage, further widening to include a center two way left turn lane (TWLTL) would provide improve operations of the driveways along SE 128th Street by providing a refuge. The added TWLTL would improve operations of the project’s northwest driveway and reduce delay to approximately 31 and 36 seconds during the PM and AM peak hours, respectively. • Provide warning indicators to vehicles along SE 128th Street. This could be the implementation of either signage or an emergency signal at the northwestern driveway. The above operational analysis is noted to generally reflect worse case conditions and does not reflect driver adjustments to sirens or lights associated with emergency signals. It is recommended that conduit be installed with the widening SE 128th Street to allow for easier installation in the future if identified as desired or warranted in the future. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Traffic Impact Analysis Renton RFA #16 – Fire Station August 2024 22 Findings and Recommendations This traffic impact study summarizes the traffic impacts of the proposed relocation of Renton’s RFA #16 Fire Station. General findings and recommendations include: Proposal – The proposed project will relocate the existing Renton RFA #16 Fire Station approximately 0.25 miles northeast of the current site to a site located south of SE 128th Street and east of 158th Avenue SE in Renton. In addition to the primary fire station being relocated, the site proposes to include an approximately 10,000 square feet (sf) maintenance building. Access to the site is proposed via three driveways, with two located along SE 128th Street and one along 158th Avenue SE. Trip generation – The relocated fire station is anticipated to generate a total of 8 weekday AM peak hour trips and 2 weekday PM peak hour trips based on observations at the existing RFA #16 Station. The maintenance facility was assumed to conservatively generate 7 trips during the weekday AM and PM peak hours. Overall, the project would be estimated to generate up to 15 trips during the weekday AM peak hour and 9 trips during the weekday PM peak hour. Traffic Operations – The study intersection of SE 128th Street/158th Avenue SE is forecast to meet the City of Renton’s LOS standards during both the weekday AM and PM peak hour conditions under future (2026) with and without project conditions. Site Access Analysis – Access to the site is proposed via three site access driveways, with two along SE 128th Street and one via 158th Avenue SE. The northeast and western site access driveways along SE 128th Street and 158th Avenue SE, respectively, are anticipated to operate within the City of Renton’s standards at LOS B or better during both the AM and PM peak hours. The northwest driveway along SE 128th Street which provides the outbound fire apparatus access is forecast to operate at LOS F during both the AM and PM peak hours. The analysis assumptions consistent with the LOS F conditions are not necessarily typical conditions but are assumed to generally reflect worse case conditions. This approach was taken as response times are critical for the proposed fire station and the associated fire apparatus. Sight Distance – The entering sight distance and stopping sight distance was evaluated in the field at the three site access driveway locations. Stopping sight distance was met at all three driveways. The recommended entering sight distance was available to the east of both driveways along SE 128th Street, and to the north of the site driveway along 158th Avenue SE. The entering sight distance of the other approaches of the driveways were limited relative to the full recommended entering sight distance such that there may be added delay to vehicles along the adjacent roadways; however, as the stopping sight distance is available, the distance required for safety is met. Mitigation – Based on the entering sight distance limitations as well as the northwestern driveway operations the following measures are identified for consideration and coordination with the City: • Continuation of 35mph posted speed along SE 128th Street through the project frontage. • Further widening along SE 128th Street to include a TWLTL for the project driveways. • Provide warning indicators to vehicles along SE 128th Street such as signage or an emergency signal at the northwestern driveway. It is recommended that conduit be installed with the widening SE 128th Street to allow for easier installation if identified as desired or warranted in the future. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Appendix A: Traffic Counts Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Prepared for: Transpo Group Traffic Count Consultants, Inc. Phone: (253) 770-1407 FAX: (253) 770-1411 E-Mail: Team@TC2inc.com WBE/DBE Intersection:Private Driveway/158th Ave SE & SE 128th St Date of Count:Tue 03/12/2024 Location:Renton, Washington Checked By:Jen Time From North on (SB)From South on (NB)From East on (WB)From West on (EB)Interval Interval Private Driveway 158th Ave SE SE 128th St SE 128th St Total Ending at T L S R T L S R T L S R T L S R 7:15 A 0 0 0 0 0 2 0 1 1 0 78 0 3 0 203 0 284 7:30 A 0 0 0 0 0 3 0 4 7 0 113 0 1 0 242 6 368 7:45 A 0 0 0 0 0 6 0 4 4 1 94 0 14 0 280 2 387 8:00 A 0 0 0 0 0 0 0 4 2 0 140 0 6 0 254 1 399 8:15 A 0 0 0 0 0 1 0 4 2 3 168 0 7 0 182 0 358 8:30 A 0 0 0 0 0 5 0 3 3 1 125 0 7 0 161 0 295 8:45 A 0 0 0 0 0 5 0 2 5 0 114 0 3 0 181 0 302 9:00 A 0 0 0 1 0 2 0 3 4 0 111 0 3 0 159 2 278 9:15 A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9:30 A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9:45 A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10:00 A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 0 0 0 1 0 24 0 25 28 5 943 0 44 0 1662 11 2671 Peak Hour: 7:15 AM to 8:15 AM Total 0 0 0 0 0 10 0 16 15 4 515 0 28 0 958 9 1512 Approach 0 26 519 967 1512 %HV n/a n/a 2.9% 2.9% 2.8% PHF n/a 0.65 0.76 0.86 0.95 Private Driveway 0 0 0 0 Bike SE 128th St 0 0 0 0 Ped SE 128th St 0 525 Ped 0 515 519 Bike 1 4 1493 1492 0 0 Bike 967 958 7:15 AM to 8:15 AM 0 Ped 974 9 PEDs Across:N S E W Ped 0 10 0 16 1596 1.0 PHF Peak Hour Volume INT 01 0 Bike 0 PHF %HV INT 02 0 EB 0.86 2.9% INT 03 0 13 26 Check WB 0.76 2.9% INT 04 0 In:1512 NB 0.65 n/a INT 05 0 39 Out:1512 SB n/a n/a INT 06 0 158th Ave SE T Int.0.95 2.8% INT 07 0 Bicycles From: N S E W Conditions: INT 08 0 INT 01 0 0 0 0 0 INT 09 0 INT 02 0 0 0 0 0 INT 10 0 INT 03 0 0 0 0 0 INT 11 0 INT 04 0 0 0 1 1 INT 12 0 INT 05 0 0 0 0 000000INT 06 0 0 0 0 0 Special Notes INT 07 0 0 0 0 0 INT 08 0 0 0 0 0 INT 09 0 INT 10 0 INT 11 0 INT 12 0 0 0 0 1 1 TPG24022M_01A Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Prepared for: Transpo Group Traffic Count Consultants, Inc. Phone: (253) 770-1407 FAX: (253) 770-1411 E-Mail: Team@TC2inc.com WBE/DBE Intersection:Private Driveway/158th Ave SE & SE 128th St Date of Count:Tue 03/12/2024 Location:Renton, Washington Checked By:Jen Time From North on (SB)From South on (NB)From East on (WB)From West on (EB)Interval Interval Private Driveway 158th Ave SE SE 128th St SE 128th St Total Ending at T L S R T L S R T L S R T L S R 4:15 P 0 0 0 0 0 1 0 0 1 2 209 0 2 0 177 4 393 4:30 P 0 0 0 0 0 1 0 1 3 0 214 0 3 0 181 5 402 4:45 P 0 0 0 0 0 3 0 4 1 2 207 0 3 0 191 4 411 5:00 P 0 0 0 0 0 5 0 3 2 3 221 0 3 0 176 9 417 5:15 P 0 0 0 0 0 4 0 1 0 2 211 0 2 1 200 6 425 5:30 P 0 0 0 0 0 3 0 0 0 3 229 0 1 1 191 12 439 5:45 P 0 0 0 0 0 3 0 3 2 1 233 0 3 0 193 8 441 6:00 P 0 0 0 1 0 1 0 5 0 1 240 0 1 0 211 8 467 6:15 P 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6:30 P 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6:45 P 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7:00 P 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 0 0 0 1 0 21 0 17 9 14 1764 0 18 2 1520 56 3395 Peak Hour: 5:00 PM to 6:00 PM Total 0 0 0 1 0 11 0 9 2 7 913 0 7 2 795 34 1772 Approach 1 20 920 831 1772 %HV n/a n/a 0.2% 0.8% 0.5% PHF 0.25 0.83 0.95 0.95 0.95 Private Driveway 3 1 2 0 Bike SE 128th St 1 0 0 0 Ped SE 128th St 0 925 Ped 0 913 920 Bike 0 7 1724 1756 2 1 Bike 831 795 5:00 PM to 6:00 PM 0 Ped 804 34 PEDs Across:N S E W Ped 0 11 0 9 1868 1.0 PHF Peak Hour Volume INT 01 0 Bike 0 PHF %HV INT 02 0 EB 0.95 0.8% INT 03 0 41 20 Check WB 0.95 0.2% INT 04 0 In:1772 NB 0.83 n/a INT 05 0 61 Out:1772 SB 0.25 n/a INT 06 0 158th Ave SE T Int.0.95 0.5% INT 07 0 Bicycles From: N S E W Conditions: INT 08 0 INT 01 0 0 0 0 0 INT 09 0 INT 02 0 0 0 0 0 INT 10 0 INT 03 0 0 0 0 0 INT 11 0 INT 04 0 0 0 0 0 INT 12 0 INT 05 0 0 1 0 100000INT 06 0 0 0 0 0 Special Notes INT 07 0 0 0 0 0 INT 08 0 0 0 0 0 INT 09 0 INT 10 0 INT 11 0 INT 12 0 0 0 1 0 1 TPG24022M_01P Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Appendix B: LOS Definitions Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Highway Capacity Manual 7th Edition Signalized intersection level of service (LOS) is defined in terms of a weighted average control delay for the entire intersection. Control delay quantifies the increase in travel time that a vehicle experiences due to the traffic signal control as well as provides a surrogate measure for driver discomfort and fuel consumption. Signalized intersection LOS is stated in terms of average control delay per vehicle (in seconds) during a specified time period (e.g., weekday PM peak hour). Control delay is a complex measure based on many variables, including signal phasing and coordination (i.e., progression of movements through the intersection and along the corridor), signal cycle length, and traffic volumes with respect to intersection capacity and resulting queues. Table 1 summarizes the LOS criteria for signalized intersections, as described in the Highway Capacity Manual 7th Edition (Transportation Research Board, 2022). Table 1. Level of Service Criteria for Signalized Intersections Level of Service Average Control Delay (seconds/vehicle) General Description A £10 Free Flow B >10 – 20 Stable Flow (slight delays) C >20 – 35 Stable flow (acceptable delays) D >35 – 55 Approaching unstable flow (tolerable delay, occasionally wait through more than one signal cycle before proceeding) E >55 – 80 Unstable flow (intolerable delay) F1 >80 Forced flow (congested and queues fail to clear) Source: Highway Capacity Manual 7th Edition, Transportation Research Board, 2022, respectively. 1. If the volume-to-capacity (v/c) ratio for a lane group exceeds 1.0 LOS F is assigned to the individual lane group. LOS for overall approach or intersection is determined solely by the control delay. Unsignalized intersection LOS criteria can be further reduced into two intersection types: all-way stop and two-way stop controlled. All-way stop controlled intersection LOS is expressed in terms of the weighted average control delay of the overall intersection or by approach. Two-way stop-controlled intersection LOS is defined in terms of the average control delay for each minor-street movement (or shared movement) as well as major-street left-turns. This approach is because major-street through vehicles are assumed to experience zero delay, a weighted average of all movements results in very low overall average delay, and this calculated low delay could mask deficiencies of minor movements. Table 2 shows LOS criteria for unsignalized intersections. Table 2. Level of Service Criteria for Unsignalized Intersections Level of Service Average Control Delay (seconds/vehicle) A 0 – 10 B >10 – 15 C >15 – 25 D >25 – 35 E >35 – 50 F1 >50 Source: Highway Capacity Manual 7th Edition, Transportation Research Board, 2022, respectively. 1. If the volume-to-capacity (v/c) ratio exceeds 1.0, LOS F is assigned an individual lane group for all unsignalized intersections, or minor street approach at two-way stop-controlled intersections. Overall intersection LOS is determined solely by control delay. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Appendix C: LOS Worksheets Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Existing Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.5 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 0 960 10 5 515 0 10 0 15 0 0 0 Future Vol, veh/h 0 960 10 5 515 0 10 0 15 0 0 0 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 3 3 3 3 3 3 0 0 0 0 0 0 Mvmt Flow 0 1011 11 5 542 0 11 0 16 0 0 0 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 542 0 0 1021 0 0 1297 1568 511 1058 1574 271 Stage 1 - - - - - - 1016 1016 - 553 553 - Stage 2 - - - - - - 282 553 - 505 1021 - Critical Hdwy 4.16 - - 4.16 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.23 - - 2.23 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 1016 - - 669 - - 121 112 513 182 111 733 Stage 1 - - - - - - 259 318 - 490 518 - Stage 2 - - - - - - 707 518 - 523 316 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 1016 - - 669 - - 120 111 513 175 110 733 Mov Cap-2 Maneuver - - - - - - 120 111 - 175 110 - Stage 1 - - - - - - 259 318 - 486 513 - Stage 2 - - - - - - 701 513 - 507 316 - Approach EB WB NB SB HCM Control Delay, s/v 0 0.19 23.35 0 HCM LOS C A Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 222 1016 - - 35 - - - HCM Lane V/C Ratio 0.118 - - - 0.008 - - - HCM Control Delay (s/veh) 23.3 0 - - 10.4 0.1 - 0 HCM Lane LOS C A - - B A - A HCM 95th %tile Q(veh) 0.4 0 - - 0 - - - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Existing Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.5 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 5 795 35 5 915 0 10 0 10 0 0 5 Future Vol, veh/h 5 795 35 5 915 0 10 0 10 0 0 5 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 1 1 1 0 0 0 0 0 0 0 0 0 Mvmt Flow 5 837 37 5 963 0 11 0 11 0 0 5 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 963 0 0 874 0 0 1358 1839 437 1403 1858 482 Stage 1 - - - - - - 866 866 - 974 974 - Stage 2 - - - - - - 492 974 - 429 884 - Critical Hdwy 4.12 - - 4.1 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.21 - - 2.2 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 717 - - 781 - - 109 76 573 101 74 536 Stage 1 - - - - - - 319 373 - 274 333 - Stage 2 - - - - - - 532 333 - 580 366 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 717 - - 781 - - 106 75 573 98 73 536 Mov Cap-2 Maneuver - - - - - - 106 75 - 98 73 - Stage 1 - - - - - - 316 370 - 272 330 - Stage 2 - - - - - - 522 330 - 564 363 - Approach EB WB NB SB HCM Control Delay, s/v 0.15 0.14 27.72 11.78 HCM LOS D B Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 179 20 - - 20 - - 536 HCM Lane V/C Ratio 0.117 0.007 - - 0.007 - - 0.01 HCM Control Delay (s/veh) 27.7 10.1 0.1 - 9.6 0.1 - 11.8 HCM Lane LOS D B A - A A - B HCM 95th %tile Q(veh) 0.4 0 - - 0 - - 0 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Future (2026) Without-Project Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.5 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 0 1000 10 5 535 0 10 0 15 0 0 0 Future Vol, veh/h 0 1000 10 5 535 0 10 0 15 0 0 0 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 3 3 3 3 3 3 0 0 0 0 0 0 Mvmt Flow 0 1053 11 5 563 0 11 0 16 0 0 0 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 563 0 0 1063 0 0 1350 1632 532 1100 1637 282 Stage 1 - - - - - - 1058 1058 - 574 574 - Stage 2 - - - - - - 292 574 - 526 1063 - Critical Hdwy 4.16 - - 4.16 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.23 - - 2.23 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 998 - - 645 - - 111 102 498 169 102 722 Stage 1 - - - - - - 244 304 - 476 507 - Stage 2 - - - - - - 697 507 - 508 302 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 998 - - 645 - - 110 101 498 162 101 722 Mov Cap-2 Maneuver - - - - - - 110 101 - 162 101 - Stage 1 - - - - - - 244 304 - 472 502 - Stage 2 - - - - - - 691 502 - 492 302 - Approach EB WB NB SB HCM Control Delay, s/v 0 0.2 24.98 0 HCM LOS C A Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 206 998 - - 33 - - - HCM Lane V/C Ratio 0.128 - - - 0.008 - - - HCM Control Delay (s/veh) 25 0 - - 10.6 0.1 - 0 HCM Lane LOS C A - - B A - A HCM 95th %tile Q(veh) 0.4 0 - - 0 - - - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Future (2026) Without-Project Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.5 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 5 825 35 5 950 0 10 0 10 0 0 5 Future Vol, veh/h 5 825 35 5 950 0 10 0 10 0 0 5 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 1 1 1 0 0 0 0 0 0 0 0 0 Mvmt Flow 5 868 37 5 1000 0 11 0 11 0 0 5 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 1000 0 0 905 0 0 1408 1908 453 1455 1926 500 Stage 1 - - - - - - 897 897 - 1011 1011 - Stage 2 - - - - - - 511 1011 - 445 916 - Critical Hdwy 4.12 - - 4.1 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.21 - - 2.2 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 694 - - 760 - - 101 69 560 93 67 522 Stage 1 - - - - - - 305 361 - 261 320 - Stage 2 - - - - - - 519 320 - 568 354 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 694 - - 760 - - 98 68 560 89 66 522 Mov Cap-2 Maneuver - - - - - - 98 68 - 89 66 - Stage 1 - - - - - - 302 357 - 258 317 - Stage 2 - - - - - - 509 317 - 551 350 - Approach EB WB NB SB HCM Control Delay, s/v 0.16 0.14 29.79 11.97 HCM LOS D B Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 166 20 - - 19 - - 522 HCM Lane V/C Ratio 0.127 0.008 - - 0.007 - - 0.01 HCM Control Delay (s/veh) 29.8 10.2 0.1 - 9.8 0.1 - 12 HCM Lane LOS D B A - A A - B HCM 95th %tile Q(veh) 0.4 0 - - 0 - - 0 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Future (2026) With-Project Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.6 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 0 1000 14 9 536 0 13 0 17 0 0 0 Future Vol, veh/h 0 1000 14 9 536 0 13 0 17 0 0 0 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 3 3 3 3 3 3 0 0 0 0 0 0 Mvmt Flow 0 1053 15 9 564 0 14 0 18 0 0 0 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 564 0 0 1067 0 0 1361 1643 534 1109 1651 282 Stage 1 - - - - - - 1060 1060 - 583 583 - Stage 2 - - - - - - 301 583 - 526 1067 - Critical Hdwy 4.16 - - 4.16 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.23 - - 2.23 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 997 - - 643 - - 109 101 496 167 100 721 Stage 1 - - - - - - 243 303 - 470 502 - Stage 2 - - - - - - 689 502 - 508 301 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 997 - - 643 - - 107 99 496 158 98 721 Mov Cap-2 Maneuver - - - - - - 107 99 - 158 98 - Stage 1 - - - - - - 243 303 - 462 493 - Stage 2 - - - - - - 677 493 - 490 301 - Approach EB WB NB SB HCM Control Delay, s/v 0 0.35 27.33 0 HCM LOS D A Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 193 997 - - 59 - - - HCM Lane V/C Ratio 0.164 - - - 0.015 - - - HCM Control Delay (s/veh) 27.3 0 - - 10.7 0.2 - 0 HCM Lane LOS D A - - B A - A HCM 95th %tile Q(veh) 0.6 0 - - 0 - - - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 2: NW Driveway & SE 128th St Future (2026) With-Project Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0 Movement EBT EBR WBL WBT NBL NBR Lane Configurations Traffic Vol, veh/h 1017 0 0 544 1 0 Future Vol, veh/h 1017 0 0 544 1 0 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Free Free Free Free Stop Stop RT Channelized - None - None - None Storage Length - - - - 0 - Veh in Median Storage, # 0 - - 0 0 - Grade, % 0 - - 0 0 - Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 3 3 3 3 100 100 Mvmt Flow 1071 0 0 573 1 0 Major/Minor Major1 Major2 Minor1 Conflicting Flow All 0 - - - 1357 535 Stage 1 - - - - 1071 - Stage 2 - - - - 286 - Critical Hdwy - - - - 8.8 8.9 Critical Hdwy Stg 1 - - - - 7.8 - Critical Hdwy Stg 2 - - - - 7.8 - Follow-up Hdwy - - - - 4.5 4.3 Pot Cap-1 Maneuver - 0 0 - 60 302 Stage 1 - 0 0 - 143 - Stage 2 - 0 0 - 512 - Platoon blocked, % - - Mov Cap-1 Maneuver - - - - 60 302 Mov Cap-2 Maneuver - - - - 60 - Stage 1 - - - - 143 - Stage 2 - - - - 512 - Approach EB WB NB HCM Control Delay, s/v 0 0 65.79 HCM LOS F Minor Lane/Major Mvmt NBLn1 EBT WBT Capacity (veh/h) 60 - - HCM Lane V/C Ratio 0.017 - - HCM Control Delay (s/veh) 65.8 - - HCM Lane LOS F - - HCM 95th %tile Q(veh) 0.1 - - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 3: NE Driveway & SE 128th St Future (2026) With-Project Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0 Movement EBT EBR WBL WBT NBL NBR Lane Configurations Traffic Vol, veh/h 1017 0 1 544 0 0 Future Vol, veh/h 1017 0 1 544 0 0 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Free Free Free Free Stop Stop RT Channelized - None - None - None Storage Length - - - - - - Veh in Median Storage, # 0 - - 0 0 - Grade, % 0 - - 0 0 - Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 3 3 3 3 2 2 Mvmt Flow 1071 0 1 573 0 0 Major/Minor Major1 Major2 Minor1 Conflicting Flow All 0 0 1071 0 1359 535 Stage 1 - - - - 1071 - Stage 2 - - - - 288 - Critical Hdwy - - 4.16 - 6.84 6.94 Critical Hdwy Stg 1 - - - - 5.84 - Critical Hdwy Stg 2 - - - - 5.84 - Follow-up Hdwy - - 2.23 - 3.52 3.32 Pot Cap-1 Maneuver - - 641 - 140 490 Stage 1 - - - - 291 - Stage 2 - - - - 735 - Platoon blocked, % - - - Mov Cap-1 Maneuver - - 641 - 140 490 Mov Cap-2 Maneuver - - - - 140 - Stage 1 - - - - 291 - Stage 2 - - - - 734 - Approach EB WB NB HCM Control Delay, s/v 0 0.04 0 HCM LOS A Minor Lane/Major Mvmt NBLn1 EBT EBR WBL WBT Capacity (veh/h) - - - 7 - HCM Lane V/C Ratio - - - 0.002 - HCM Control Delay (s/veh) 0 - - 10.6 0 HCM Lane LOS A - - B A HCM 95th %tile Q(veh) - - - 0 - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 4: 158th Ave SE & W Driveway Future (2026) With-Project Weekday AM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 1.9 Movement WBL WBR NBT NBR SBL SBT Lane Configurations Traffic Vol, veh/h 0 5 25 0 8 15 Future Vol, veh/h 0 5 25 0 8 15 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - - - - - Veh in Median Storage, # 0 - 0 - - 0 Grade, % 0 - 0 - - 0 Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 0 5 26 0 8 16 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 59 26 0 0 26 0 Stage 1 26 - - - - - Stage 2 33 - - - - - Critical Hdwy 6.42 6.22 - - 4.12 - Critical Hdwy Stg 1 5.42 - - - - - Critical Hdwy Stg 2 5.42 - - - - - Follow-up Hdwy 3.518 3.318 - - 2.218 - Pot Cap-1 Maneuver 948 1049 - - 1588 - Stage 1 996 - - - - - Stage 2 990 - - - - - Platoon blocked, % - - - Mov Cap-1 Maneuver 943 1049 - - 1588 - Mov Cap-2 Maneuver 943 - - - - - Stage 1 996 - - - - - Stage 2 985 - - - - - Approach WB NB SB HCM Control Delay, s/v 8.45 0 2.53 HCM LOS A Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity (veh/h) - - 1049 626 - HCM Lane V/C Ratio - - 0.005 0.005 - HCM Control Delay (s/veh) - - 8.4 7.3 0 HCM Lane LOS - - A A A HCM 95th %tile Q(veh) - - 0 0 - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 1: 158th Ave SE/Privaate Dwy & SE 128th St Future (2026) With-Project Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0.6 Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations Traffic Vol, veh/h 5 825 37 5 951 0 13 0 13 0 0 5 Future Vol, veh/h 5 825 37 5 951 0 13 0 13 0 0 5 Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0 Sign Control Free Free Free Free Free Free Stop Stop Stop Stop Stop Stop RT Channelized - - None - - None - - None - - None Storage Length - - - - - - - - - - - - Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 - Grade, % - 0 - - 0 - - 0 - - 0 - Peak Hour Factor 95 95 95 95 95 95 95 95 95 95 95 95 Heavy Vehicles, % 1 1 1 0 0 0 0 0 0 0 0 0 Mvmt Flow 5 868 39 5 1001 0 14 0 14 0 0 5 Major/Minor Major1 Major2 Minor1 Minor2 Conflicting Flow All 1001 0 0 907 0 0 1409 1910 454 1456 1929 501 Stage 1 - - - - - - 898 898 - 1012 1012 - Stage 2 - - - - - - 511 1012 - 445 918 - Critical Hdwy 4.12 - - 4.1 - - 7.5 6.5 6.9 7.5 6.5 6.9 Critical Hdwy Stg 1 - - - - - - 6.5 5.5 - 6.5 5.5 - Critical Hdwy Stg 2 - - - - - - 6.5 5.5 - 6.5 5.5 - Follow-up Hdwy 2.21 - - 2.2 - - 3.5 4 3.3 3.5 4 3.3 Pot Cap-1 Maneuver 693 - - 758 - - 100 69 559 93 67 521 Stage 1 - - - - - - 305 361 - 260 320 - Stage 2 - - - - - - 519 320 - 568 353 - Platoon blocked, % - - - - Mov Cap-1 Maneuver 693 - - 758 - - 97 68 559 89 66 521 Mov Cap-2 Maneuver - - - - - - 97 68 - 89 66 - Stage 1 - - - - - - 301 357 - 258 316 - Stage 2 - - - - - - 509 316 - 548 350 - Approach EB WB NB SB HCM Control Delay, s/v 0.16 0.14 30.97 11.98 HCM LOS D B Minor Lane/Major Mvmt NBLn1 EBL EBT EBR WBL WBT WBRSBLn1 Capacity (veh/h) 166 20 - - 19 - - 521 HCM Lane V/C Ratio 0.165 0.008 - - 0.007 - - 0.01 HCM Control Delay (s/veh) 31 10.2 0.1 - 9.8 0.1 - 12 HCM Lane LOS D B A - A A - B HCM 95th %tile Q(veh) 0.6 0 - - 0 - - 0 Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 2: NW Driveway & SE 128th St Future (2026) With-Project Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0 Movement EBT EBR WBL WBT NBL NBR Lane Configurations Traffic Vol, veh/h 843 0 0 955 1 0 Future Vol, veh/h 843 0 0 955 1 0 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Free Free Free Free Stop Stop RT Channelized - None - None - None Storage Length - - - - 0 - Veh in Median Storage, # 0 - - 0 0 - Grade, % 0 - - 0 0 - Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 1 1 0 0 100 100 Mvmt Flow 887 0 0 1005 1 0 Major/Minor Major1 Major2 Minor1 Conflicting Flow All 0 - - - 1390 444 Stage 1 - - - - 887 - Stage 2 - - - - 503 - Critical Hdwy - - - - 8.8 8.9 Critical Hdwy Stg 1 - - - - 7.8 - Critical Hdwy Stg 2 - - - - 7.8 - Follow-up Hdwy - - - - 4.5 4.3 Pot Cap-1 Maneuver - 0 0 - 56 360 Stage 1 - 0 0 - 194 - Stage 2 - 0 0 - 363 - Platoon blocked, % - - Mov Cap-1 Maneuver - - - - 56 360 Mov Cap-2 Maneuver - - - - 56 - Stage 1 - - - - 194 - Stage 2 - - - - 363 - Approach EB WB NB HCM Control Delay, s/v 0 0 70.02 HCM LOS F Minor Lane/Major Mvmt NBLn1 EBT WBT Capacity (veh/h) 56 - - HCM Lane V/C Ratio 0.019 - - HCM Control Delay (s/veh) 70 - - HCM Lane LOS F - - HCM 95th %tile Q(veh) 0.1 - - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 3: NE Driveway & SE 128th St Future (2026) With-Project Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 0 Movement EBT EBR WBL WBT NBL NBR Lane Configurations Traffic Vol, veh/h 843 0 0 955 0 0 Future Vol, veh/h 843 0 0 955 0 0 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Free Free Free Free Stop Stop RT Channelized - None - None - None Storage Length - - - - - - Veh in Median Storage, # 0 - - 0 0 - Grade, % 0 - - 0 0 - Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 1 1 0 0 2 2 Mvmt Flow 887 0 0 1005 0 0 Major/Minor Major1 Major2 Minor1 Conflicting Flow All 0 0 887 0 1390 444 Stage 1 - - - - 887 - Stage 2 - - - - 503 - Critical Hdwy - - 4.1 - 6.84 6.94 Critical Hdwy Stg 1 - - - - 5.84 - Critical Hdwy Stg 2 - - - - 5.84 - Follow-up Hdwy - - 2.2 - 3.52 3.32 Pot Cap-1 Maneuver - - 772 - 133 562 Stage 1 - - - - 363 - Stage 2 - - - - 573 - Platoon blocked, % - - - Mov Cap-1 Maneuver - - 772 - 133 562 Mov Cap-2 Maneuver - - - - 133 - Stage 1 - - - - 363 - Stage 2 - - - - 573 - Approach EB WB NB HCM Control Delay, s/v 0 0 0 HCM LOS A Minor Lane/Major Mvmt NBLn1 EBT EBR WBL WBT Capacity (veh/h) - - - 772 - HCM Lane V/C Ratio - - - - - HCM Control Delay (s/veh) 0 - - 0 - HCM Lane LOS A - - A - HCM 95th %tile Q(veh) - - - 0 - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 HCM 7th TWSC Renton RFA #16 - Fire Station 4: 158th Ave SE & W Driveway Future (2026) With-Project Weekday PM Peak Hour Transpo Group Synchro 12 Report Intersection Int Delay, s/veh 1 Movement WBL WBR NBT NBR SBL SBT Lane Configurations Traffic Vol, veh/h 0 6 20 0 2 40 Future Vol, veh/h 0 6 20 0 2 40 Conflicting Peds, #/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - - - - - Veh in Median Storage, # 0 - 0 - - 0 Grade, % 0 - 0 - - 0 Peak Hour Factor 95 95 95 95 95 95 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 0 6 21 0 2 42 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 67 21 0 0 21 0 Stage 1 21 - - - - - Stage 2 46 - - - - - Critical Hdwy 6.42 6.22 - - 4.12 - Critical Hdwy Stg 1 5.42 - - - - - Critical Hdwy Stg 2 5.42 - - - - - Follow-up Hdwy 3.518 3.318 - - 2.218 - Pot Cap-1 Maneuver 938 1056 - - 1595 - Stage 1 1002 - - - - - Stage 2 976 - - - - - Platoon blocked, % - - - Mov Cap-1 Maneuver 936 1056 - - 1595 - Mov Cap-2 Maneuver 936 - - - - - Stage 1 1002 - - - - - Stage 2 975 - - - - - Approach WB NB SB HCM Control Delay, s/v 8.43 0 0.35 HCM LOS A Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity (veh/h) - - 1056 86 - HCM Lane V/C Ratio - - 0.006 0.001 - HCM Control Delay (s/veh) - - 8.4 7.3 0 HCM Lane LOS - - A A A HCM 95th %tile Q(veh) - - 0 0 - Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Appendix D: Detailed Existing RFA Station #16 Observations Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Renton RFA #16 Trip Generation and Parking Observations AM Peak Hour Observations (7-9 AM)156th Ave SE runs N/S in front of Station driveway 7:00 AM 3 vehicles parked 9:00 AM 4 vehicles parked IN Time Turning Movement OUT Time Turning Movement Notes 7:37 AM SBR Parked 7:43 AM NBL 7:51 AM EBR Dropped something off inside station 7:45 AM NBL Parked 8:23 AM EBR from Parked 8:27 AM SBR 8:30 AM EBR Dropped something off inside station 8:37 AM EBL from Parked 8:42 AM SBR 8:47 AM EBL Dropped something off inside station 8:44 AM SBR Parked (Police Car) PM Peak Hour Observations (4-6 PM) 4:00 PM 3 vehicles parked 6:00 PM 3 vehicles parked IN Time Turning Movement OUT Time Turning Movement Notes 4:04 PM EBL Fire Truck with Lights Leaving 5:01 PM SBR Fire Truck Returning Trip Generation (Peak Hour) AM Observations Time Rolling 1hr Total Direction 7:37 AM 0 in 7:43 AM 2 in 7:45 AM 3 in 7:51 AM 4 out 8:23 AM 5 out 8:27 AM 6 in 8:30 AM 7 out 8:37 AM 7 out 8:42 AM 8 in 8:44 AM 8 in 8:47 AM 8 out *7:47-8:47 AM Peak Hour with 8 trips (38% Inbound) PM Observations Time Rolling 1hr Total Direction 4:04 PM 0 out 5:01 PM 2 in *4:04-5:04 PM Peak Hour with 2 trips (50% Inbound) In Out Total AM Peak Hour 3 5 8 PM Peak Hour 1 1 2 Net New Trips Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Appendix E: Detailed Trip Generation Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3 Land Use Setting Size Units Model Rate Inbound % Inbound Outbound Total 10,000 sf AM Peak Hour General Urban/Suburban Rate 0.74 88%6 1 7 PM Peak Hour General Urban/Suburban Rate 0.65 14%1 6 7 Primary Trips Renton RFA #16 Maintenance Building Proposed Use General Light Industrial (LU 110) Notes: 1. Trip rates based on Institute of Transportation Engineers' (ITE) Trip Generation 11th Edition equation and average trip rates as shown above. Docusign Envelope ID: 9C8AD163-664C-4B8F-8817-4315F1866DB3