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HomeMy WebLinkAboutRS_Sunset Oaks TIA - 191030_v2.pdf 12131 113th Avenue NE, Suite 203, Kirkland, WA 98034 | 425.821.3665 | FINAL MEMORANDUM Date: September 11, 2019 TG:1.19223.00 To: Brianne Bannwarth – City of Renton From: Stefanie Herzstein PE, PTOE and Francesca Liburdy – Transpo Group cc: Bob Baldwin – McCullough Allen Lisa Grueter, AICP – BERK Consulting Subject: Renton Sunset Oaks Final Transportation Impact Analysis This analysis identifies potential transportation-related impacts associated with the proposed Sunset Oaks residential development north of NE 10th Street between Glenwood Avenue NE and Harrington Avenue NE in Renton, WA. This final transportation impact analysis incorporates City staff’s review of the study. Background The project is sites 14, 16 and 17 in the Sunset Terrace Master Plan as shown on Figure 1. Figure 1 – Sunset Terrace Master Plan 2 Transportation-related impacts of the Master Plan were documented in the Sunset Area Community Planned Action Update: Traffic Analysis Results - May 2014 Redevelopment Master Site Plan Alternative (CH2MHill, 2014). The proposed project includes more dwellings than included in the current Master Plan and requires Master Plan revisions to reallocate dwelling units to the Renton Housing Authority Sunset Oaks properties and reflect other public, private and non- profit development activities that have been permitted or constructed in the last several years. Transportation analysis associated with the Sunset Terrace Master Plan reallocation of 87 dwelling units including 52 dwelling units to the Sunset Oaks properties was documented in the memorandum Sunset Oaks and Master Site Plan: Transportation Analysis prepared by Transpo Group dated July 23, 2019. The analysis of the Master Plan dwelling unit reallocation found that there would be no new transportation impacts and the mitigation measures identified in the previous Master Plan analysis would be appropriate. Based on the 2030 build-out of the Master Plan, mitigation measures identified include potential improvements to the Edmonds Avenue NE/NE 12th Street and Harrington Avenue NE/NE 12th Street intersections to maintain LOS D operations. As an affordable housing residential project, payment of the City’s transportation impact fees would not be required, These findings are being incorporated into updated SEPA/NEPA analysis for the Sunset Terrace Master Plan. The following documents the project-specific transportation impact analysis (TIA) for the Sunset Oaks property. Project Description The proposed project includes up to 62 affordable multifamily housing units located in the Sunset Area neighborhood of Renton. The site vicinity is shown on Figure 2. Figure 2 – Site Vicinity The project site is currently undeveloped and the project is anticipated to be constructed and occupied by 2021. Vehicle access to the site is proposed via Harrington Avenue NE and 3 Glennwood Avenue NE. There would also be a non-motorized connection via Sunset Lane NE. Figure 3 shows the site plan depicting the proposed site and driveways. Figure 3 – Preliminary Site Plan Study Scope The scope of the analysis is consistent with the City of Renton’s Traffic Impact Analysis Policy Guidelines for New Developments (2016) and was reviewed and approved by the City through a scoping process. Based on coordination with the City, the analysis focuses on the weekday PM peak hour. Considering anticipated trip distribution patterns described later in the study and the City’s guidelines stating the study area should include intersections experiencing a 5 percent increase in peak hour traffic volumes as a result of the proposed development, the analysis focuses on the two site access locations under future with-project conditions. As described previously, the proposed project is part of the Sunset Terrace Master Plan Amendment1 and a separate transportation analysis was conducted related to the reallocation of dwelling units. The Master Plan analysis evaluated traffic volume impacts at the NE 12th Street/ Harrington Avenue NE, NE Sunset Boulevard/NE 10th Street, and NE Sunset Boulevard/ Harrington Avenue NE intersections and found that there would be a 0.5 to 2.4 percent in total intersection volumes at these locations as a result of the proposed Master Plan Amendment. This increase in traffic volumes is less than the City’s 5 percent threshold used to determine the study area for project-specific TIAs. This analysis supports limiting the study intersections for the Sunset Oaks development TIA to the site accesses. 1 Memorandum Sunset Oaks and Master Site Plan: Transportation Analysis, Transpo Group, July 2019. 4 Existing Transportation Context The following section summarizes the existing transportation context of the proposed project, including the surrounding roadway network, non-motorized facilities, transit, traffic safety, and vehicle volumes. Roadway Network The project site is located in the City of Renton and is bounded by Glennwood Avenue NE, Harrington Avenue NE, and Sunset Lane NE. Descriptions of the roadways within the project area are provided below. Glennwood Avenue NE is classified as a local street and has a narrow travel way. On-street parking occurs on the shoulder on both sides of the street narrowing the travel way further. The posted speed limit is 25 miles per hour (mph). No sidewalks are provided along Glennwood Avenue NE in the vicinity of the project. Harrington Avenue NE is classified as a local street and has two lanes per direction. The posted speed limit is 25 mph. Sidewalks and on-street parking are provided on both sides of the street. Sunset Lane NE is classified as a local street with a posted speed of 25 mph. It has a narrow travel way. Sidewalks and on-street parking are provided on both sides of the street. Non-Motorized Facilities Sidewalks are provided throughout the study area with the exception of Glennwood Avenue NE. Marked crosswalks are provided at the Glennwood Avenue NE/Sunset Lane NE and Harrington Avenue NE/Sunset Lane NE intersections. No bicycle facilities are provided in the vicinity of the project site; however, the roadways are local streets with low traffic volumes. Transit The project site is located in proximity to transit operated by King County Metro. There are numerous stops along NE Sunset Blvd and NE 12th Avenue, nearby principal arterial roadways. The closest bus stops are located a 0.2 mile walking distance or an approximately 5-minute walk from the project site. Connections to King County Metro routes near the project site are summarized in Table 1. Table 1. Existing Transit Service Approximate Weekday Operating Hours AM Peak Period Trips PM Peak Period Trips Headways (minutes) Routes Area Served 111 Maplewood to Lake Kathleen to Downtown Seattle 5:50 a.m. – 8:45 a.m. 4 4 30 4:00 p.m. – 7:00 p.m. 240 Bellevue to Renton 5:00 a.m. – 12:00 a.m. 7 7 15 105 Renton Highlands to Renton TC 4:30 a.m. – 12:10 a.m. 3 3 30 Source: King County Metro (August 2019). The King County Metro transit service provides access to the Renton Transit Center, which is located approximately 3-miles south of the Sunset Terrace neighborhood. Connections at Renton Transit Center provide bus access to SeaTac, Kent, Auburn, Bellevue, and Overlake via both King County Metro and Sound Transit. There is a proposed bus rapid transit (BRT) expansion along I- 405 slated to be completed by Sound Transit in year 2024. There would be a stop at the Renton Transit Center. 5 Traffic Safety Collision records were reviewed within the study area to document potential traffic safety issues. The collision data from Washington State Department of Transportation (WSDOT) is for the most recent 5-year period between January 1, 2014 and December 31, 2018. A historical review of collisions was conducted at the roadways directly surrounding the site. Only one collision was reported along the roadways and intersections directly adjacent to the project area. In 2016, a vehicle making a northbound left-turn onto Sunset Lane NE out of a driveway 200-feet east of Harrington Avenue NE had a collision with a bicyclist. There were no reported fatalities within or surrounding the study area. Trip Generation The proposed project includes up to 62-multifamily affordable housing units. Trip generation estimates have been prepared for the development based on trip rates identified using the Institute of Transportation Engineers (ITE) Trip Generation Manual, 10th Edition (2017). Table 2 provides a summary of the trip generation for the proposed land use. Table 2. Estimated Weekday Vehicle Trip Generation Land Use Size Daily Trips AM Peak Hour Trips PM Peak Hour Trips In Out Total In Out Total Multifamily Housing Mid-Rise (LU #221) 62 du 337 6 16 22 16 11 27 Notes: du = dwelling units As shown in Table 2, the proposed project is anticipated to generate approximately 337 daily vehicle trips with approximately 22 trips during the weekday AM peak hour and 27 trips during the weekday PM peak hour. Trip Distribution and Assignment Weekday PM peak hour trip distribution patterns to and from the project site were based on existing vehicle travel patterns and the U.S. Census Bureau’s OnTheMap tool. OnTheMap is a web-based mapping and reporting application, which shows where residents in the area work based on census data. Project traffic was assigned to the site driveways based on the trips’ anticipated final destination and the location of the dwelling units. Anticipated trip distribution and assignment for the proposed project are shown on Figure 4. Traffic Volumes Existing weekday PM (4 to 6 p.m.) peak period traffic counts were collected at the Harrington Avenue NE/Glennwood Avenue NE, Glennwood Avenue NE/NE 10th Street, and Harrington Avenue NE/NE 10th Street intersections in August 2019. These volumes were used to develop future traffic forecasts at the proposed site accesses. Detailed intersection traffic counts are provided in Attachment A. Future (2021) with-project weekday PM peak hour traffic volumes were estimated by growing existing traffic volumes by three (3) percent per year to 2021 conditions, consistent with other projects completed in the City. No pipeline projects were identified within the study area. The resulting future (2021) with-project volumes at the site accesses are summarized on Figure 4. 6 Figure 4 – Trip Distribution, Assignment & Future Weekday PM Peak Hour Traffic Volumes Site Access Analysis The traffic operations at each of the site driveways was analyzed under future with-project conditions for the weekday PM peak hour. At unsignalized side-street stop-controlled intersections, LOS is measured by the average delay per vehicle of the worst-movement. 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. The operational analysis is consistent with Highway Capacity Manual (HCM) 6th Edition method and evaluated in Synchro 10. Synchro 10 is a software program that uses the HCM method to evaluate intersection LOS and average vehicle delays. Under future (2021) with-project conditions, both site accesses are anticipated to operate at LOS A during the weekday PM peak hour with approximately 9 seconds of delay. LOS worksheets are included in Attachment B. 7 Mitigation Measures As discussed previously, mitigation measures identified for the Sunset Terrace Master Plan include potential improvements to the Edmonds Avenue NE/NE 12th Street and Harrington Avenue NE/NE 12th Street intersections to maintain LOS D operations. As an affordable housing residential project, payment of the City’s transportation impact fees will not be required. Intersection Improvements The proposed project’s anticipated increase in traffic volumes at the Edmonds Avenue NE/NE 12th Street and Harrington Avenue NE/NE 12th Street intersections is anticipated to be small and less than 5 percent as demonstrated in the Master Plan Amendment analysis and shown on Figure 4 of this study. A review of the Sunset Court project-specific TIA2 shows that the Edmonds Avenue NE and Harrington Avenue NE intersections along NE 12th Street were anticipated to operate at LOS B or better during the weekday PM peak hour under future 2017 conditions. A sensitivity analysis was conducted by Transpo to understand potential future 2021 with-project conditions at the Edmonds Avenue NE/NE 12th Street and Harrington Avenue NE/NE 12th Street intersections. The sensitivity analysis uses the Sunset Court traffic volumes to project 2021 conditions assuming a three (3) percent per year growth rate and adding the project traffic. The Edmonds Avenue NE/NE 12th Street and Harrington Avenue NE/NE 12th Street intersections would operate at LOS B during the weekday PM peak hour in 2021; therefore, no mitigation would be needed with the proposed project. Conclusions Key findings of this TIA include: · The proposed project would generate approximately 337 daily vehicle trips with 22 weekday AM peak hour and 27 weekday PM peak hour trips. · Both site accesses are forecast to operate at LOS A during the weekday PM Peak hour under future (2021) with-project conditions. · No significant impacts requiring mitigation are anticipated with the proposed project. 2 Ally Community Development, LLC Traffic Impact Analysis Sunset Court, Perteet, September 10, 2015. 8 Attachment A: Traffic Counts Peak Hour:05:00 PM - 06:00 PM HARRINGTON AVE NE HARRINGTON AVE NEGLENWOOD AVE NEGLENWOOD AVE NE (303) 216-2439 www.alltrafficdata.net Location:1 HARRINGTON AVE NE & GLENWOOD AVE NE PM Thursday, August 1, 2019Date: All Vehicles Pedestrians/Bicycles in Crosswalk Traffic Counts - All Vehicles Heavy Vehicles Peak Hour Traffic Counts - Heavy Vehicles and Pedestrians/Bicycles in Crosswalk3120 0 1 1 0 4 39 41 1 2 3735 5 4 N S EW 0 0 3313600GLENWOOD AVE NE GLENWOOD AVE NEHARRINGTON AVEHARRINGTON AV82 0 214N S EW 1110 0 0 40Interval Start Time RightLeft Thru Total Eastbound Westbound Northbound Southbound U-Turn Rolling HourRightLeft ThruU-Turn RightLeft ThruU-Turn RightLeft ThruU-Turn 4:00 PM 630 2 0 0 0 0 0 0 4 0 1 1 90 0 0 1 4:15 PM 730 2 0 0 0 0 0 0 4 0 0 9 170 0 0 2 4:30 PM 750 3 0 0 0 0 0 0 5 0 0 5 160 0 0 3 4:45 PM 780 0 0 0 1 0 0 1 10 0 0 5 210 0 0 4 5:00 PM 820 1 0 0 0 0 0 1 11 0 1 4 191 0 0 0 5:15 PM 0 0 0 0 0 0 0 0 6 1 0 12 190 0 0 0 5:30 PM 0 0 0 0 0 0 0 0 8 0 0 9 190 0 0 2 5:45 PM 0 3 0 0 1 0 0 0 11 0 1 8 250 0 0 1 Count Total 0 11 0 0 2 0 0 2 59 1 3 53 1451 0 0 13 Peak Hour 0 4 0 0 1 0 0 1 36 1 2 33 821 0 0 3 HV% PHF 0.42 0.25 0.77 0.75 0.0% 0.0% 2.7% 5.1% 3.7% 0.82 EB WB NB SB All 0000 0 0 0 0 0 2 1 0 0 12 0 0 N S EW 0 0 20100Heavy VehiclesInterval Start Time EB NB TotalWB SB 4:00 PM 0 0 0 0 0 4:15 PM 0 0 0 0 0 4:30 PM 0 0 0 0 0 4:45 PM 0 0 0 0 0 5:00 PM 0 0 0 0 0 5:15 PM 0 1 0 2 3 5:30 PM 0 0 0 0 0 5:45 PM 0 0 0 0 0 Count Total 0 1 0 2 3 Peak Hour 0 1 0 2 3 Pedestrians/Bicycles on CrosswalkInterval Start Time EB NB TotalWB SB 4:00 PM 0 0 4 1 5 4:15 PM 0 0 2 1 3 4:30 PM 1 0 3 0 4 4:45 PM 3 0 0 0 3 5:00 PM 4 0 1 0 5 5:15 PM 0 0 0 0 0 5:30 PM 0 0 0 0 0 5:45 PM 0 1 1 0 2 Count Total 8 1 11 2 22 Peak Hour 4 1 2 0 7 Peak Hour:05:00 PM - 06:00 PM GLENWOOD AVE NESUNSET LN NESUNSET LN NE (303) 216-2439 www.alltrafficdata.net Location:2 GLENWOOD AVE NE & SUNSET LN NE PM Thursday, August 1, 2019Date: All Vehicles Pedestrians/Bicycles in Crosswalk Traffic Counts - All Vehicles Heavy Vehicles Peak Hour Traffic Counts - Heavy Vehicles and Pedestrians/Bicycles in Crosswalk3034 6 0 0 2 5 6 9 10 57 9 N S EW 0 0 0SUNSET LN NE SUNSET LN NE GLENWOOD AVE 23 1 02N S EW 000 1 02Interval Start Time RightLeft Thru Total Eastbound Westbound Northbound Southbound U-Turn Rolling HourRightLeft ThruU-Turn RightLeft ThruU-Turn RightLeft ThruU-Turn 4:00 PM 170 0 1 0 0 1 0 0 0 40 2 0 4:15 PM 220 0 0 0 0 2 0 0 0 50 1 2 4:30 PM 200 1 1 0 0 1 0 1 0 50 1 0 4:45 PM 180 0 1 0 0 1 0 0 0 30 0 1 5:00 PM 230 2 0 0 0 3 0 2 0 90 1 1 5:15 PM 0 0 1 0 0 1 0 0 0 30 1 0 5:30 PM 0 2 0 0 0 1 0 0 0 30 0 0 5:45 PM 0 1 1 0 0 1 0 1 0 80 2 2 Count Total 0 6 5 0 0 11 0 4 0 400 8 6 Peak Hour 0 5 2 0 0 6 0 3 0 230 4 3 HV% PHF 0.88 0.63 0.50 0.0% 0.0% 0.0% 0.0% 0.64 EB WB NB SB All 0000 0 0 0 0 0 0 0 0 00 0 N S EW 0 0 0Heavy VehiclesInterval Start Time EB NB TotalWB SB 4:00 PM 0 0 0 0 4:15 PM 0 0 0 0 4:30 PM 0 0 0 0 4:45 PM 0 0 0 0 5:00 PM 0 0 0 0 5:15 PM 0 0 0 0 5:30 PM 0 0 0 0 5:45 PM 0 0 0 0 Count Total 0 0 0 0 Peak Hour 0 0 0 0 Pedestrians/Bicycles on CrosswalkInterval Start Time EB NB TotalWB SB 4:00 PM 0 0 0 0 4:15 PM 0 0 0 0 4:30 PM 0 0 1 1 4:45 PM 0 0 1 1 5:00 PM 0 0 0 0 5:15 PM 1 0 1 2 5:30 PM 1 0 0 1 5:45 PM 0 0 0 0 Count Total 2 0 3 5 Peak Hour 2 0 1 3 Peak Hour:05:00 PM - 06:00 PM HARRINGTON AVE NENE 10TH STSUNSET LN NE (303) 216-2439 www.alltrafficdata.net Location:3 HARRINGTON AVE NE & NE 10TH ST PM Thursday, August 1, 2019Date: All Vehicles Pedestrians/Bicycles in Crosswalk Traffic Counts - All Vehicles Heavy Vehicles Peak Hour Traffic Counts - Heavy Vehicles and Pedestrians/Bicycles in Crosswalk303039 8 0 0 4 1 33 40 47 345 11 N S EW 0 0 0SUNSET LN NE NE 10TH ST HARRINGTON AV85 1 69N S EW 421 0 90Interval Start Time RightLeft Thru Total Eastbound Westbound Northbound Southbound U-Turn Rolling HourRightLeft ThruU-Turn RightLeft ThruU-Turn RightLeft ThruU-Turn 4:00 PM 540 1 0 0 0 2 0 1 0 80 3 1 4:15 PM 690 0 0 0 0 1 0 7 0 140 3 3 4:30 PM 670 0 3 0 0 0 0 4 0 150 6 2 4:45 PM 700 1 0 0 0 1 0 4 0 170 11 0 5:00 PM 850 0 2 0 0 3 0 4 0 230 13 1 5:15 PM 0 0 1 0 0 2 0 5 0 120 4 0 5:30 PM 0 0 0 0 0 1 0 7 0 180 9 1 5:45 PM 0 1 1 0 0 2 0 14 0 320 13 1 Count Total 0 3 7 0 0 12 0 46 0 1390 62 9 Peak Hour 0 1 4 0 0 8 0 30 0 850 39 3 HV% PHF 0.63 0.73 0.55 0.0% 0.0% 3.0% 1.2% 0.66 EB WB NB SB All 0010 0 0 0 0 0 1 0 0 10 0 N S EW 0 0 0Heavy VehiclesInterval Start Time EB NB TotalWB SB 4:00 PM 0 0 0 0 4:15 PM 0 0 0 0 4:30 PM 0 0 0 0 4:45 PM 0 0 0 0 5:00 PM 0 0 0 0 5:15 PM 0 0 0 0 5:30 PM 0 0 0 0 5:45 PM 0 0 1 1 Count Total 0 0 1 1 Peak Hour 0 0 1 1 Pedestrians/Bicycles on CrosswalkInterval Start Time EB NB TotalWB SB 4:00 PM 0 1 0 1 4:15 PM 0 0 0 0 4:30 PM 0 1 0 1 4:45 PM 2 0 0 2 5:00 PM 5 4 0 9 5:15 PM 1 0 1 2 5:30 PM 0 0 0 0 5:45 PM 3 2 0 5 Count Total 11 8 1 20 Peak Hour 9 6 1 16 9 Attachment B: LOS Worksheets HCM 6th TWSC Sunset Oaks Apartments 4: Glennwood Ave NE & Site Access Future (2021) With-Project PM Peak Hour Transpo Group Synchro 10 Report Intersection Int Delay, s/veh 1.8 Movement WBL WBR NBT NBR SBL SBT Lane Configurations Traffic Vol, veh/h 4 1 10 7 1 5 Future Vol, veh/h 4 1 10 7 1 5 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 92 92 92 92 92 92 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 4 1 11 8 1 5 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 22 15 0 0 19 0 Stage 1 15 - - - - - Stage 2 7 - - - - - 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 995 1065 - - 1597 - Stage 1 1008 - - - - - Stage 2 1016 - - - - - Platoon blocked, % - - - Mov Cap-1 Maneuver 994 1065 - - 1597 - Mov Cap-2 Maneuver 994 - - - - - Stage 1 1008 - - - - - Stage 2 1015 - - - - - Approach WB NB SB HCM Control Delay, s 8.6 0 1.2 HCM LOS A Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity (veh/h) - - 1007 1597 - HCM Lane V/C Ratio - - 0.005 0.001 - HCM Control Delay (s) - - 8.6 7.3 0 HCM Lane LOS - - A A A HCM 95th %tile Q(veh) - - 0 0 - HCM 6th TWSC Sunset Oaks Apartments 5: Harrington Ave NE & Site Access Future (2021) With-Project PM Peak Hour Transpo Group Synchro 10 Report Intersection Int Delay, s/veh 1.2 Movement EBL EBR NBL NBT SBT SBR Lane Configurations Traffic Vol, veh/h 1 5 7 40 35 1 Future Vol, veh/h 1 5 7 40 35 1 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 92 92 92 92 92 92 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 1 5 8 43 38 1 Major/Minor Minor2 Major1 Major2 Conflicting Flow All 98 39 39 0 - 0 Stage 1 39 - - - - - Stage 2 59 - - - - - 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 901 1033 1571 - - - Stage 1 983 - - - - - Stage 2 964 - - - - - Platoon blocked, % - - - Mov Cap-1 Maneuver 896 1033 1571 - - - Mov Cap-2 Maneuver 896 - - - - - Stage 1 978 - - - - - Stage 2 964 - - - - - Approach EB NB SB HCM Control Delay, s 8.6 1.1 0 HCM LOS A Minor Lane/Major Mvmt NBL NBT EBLn1 SBT SBR Capacity (veh/h) 1571 - 1007 - - HCM Lane V/C Ratio 0.005 - 0.006 - - HCM Control Delay (s) 7.3 0 8.6 - - HCM Lane LOS A A A - - HCM 95th %tile Q(veh) 0 - 0 - -