HomeMy WebLinkAboutEX_06_RS_Woods Coffee Limited Scope TIA5510 15 th St E
Fife, WA 98424
253.267.8650
phtraffic.com
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7/21/2025
TO: Soyam Vahora, Askah Sunset Renton Property
Edi Linardic, LDG Architects
FROM: Jeff Hee, PE, Sr. Traffic Engineer
SUBJECT: Woods Coffee Sunset Renton
Limited Scope Traffic Impact Analysis
Introduction
This limited scope traffic impact analysis is for Wood Coffee Sunset Renton, a proposed coffee shop
with drive-through, at 151 Sunset Blvd N, in the City of Renton, WA.
The project is on land parcel no. 1723059074, at the northwest corner of Sunset Blvd N & Bronson Way
N. Railroad tracks front the west side of the site and commercial properties are to the north. The site is
zoned Commercial Arterial (CA).
Figure 1 includes a vicinity map.
The proposed coffee shop with drive through will redevelop a former restaurant building (2,970 square
feet) on the site. The project will reuse the existing site accesses off Sunset Blvd N and Bronson Way
N. Built-out is anticipated by 2027.
Figure 2 includes a conceptual site plan.
Resources used for this analysis include:
• City of Renton, Policy Guidelines for Traffic Impact Analysis for New Development, 2024.
• City of Reton, Municipal Code, Title IV Development Regulations.
• City of Renton, Comprehensive Plan 2024.
• City of Renton, 2025-2030 Six-Year Transportation Improvement Program (STIP), 2024
• City of Renton, 2025-2026 Fee Schedule
• WSDOT Crash Portal
• WSDOT Design Manual Chapters 1260 and 1310
• Institute of Transportation Engineers (ITE), Trip Generation Manual, 11th Edition.
• Institute of Transportation Engineers (ITE), Parking Generation Manual, 6th Edition.
5510 15 th St E
Fife, WA 98424
253.267.8650
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Figure 1. Vicinity Map
Figure 2. Conceptual Site Plan
5510 15 th St E
Fife, WA 98424
253.267.8650
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Trip Generation, Distribution, & Assignment
Data from ITE Land Use 937, “Coffee/Donut Shop with Drive-Through Window,” was used to forecast
trip generation for the proposed coffee shop with drive-through. There is no pass-by data available for
Land Use 937. Pass-by rates for the proposed project, based on its location, were assumed to be
similar to the pass-by rates for ITE Land Use 938, “Coffee/Donut Shop with Drive-Through Window and
No Indoor Seating.” The AM peak hour pass-by rate for Land Use 938 is 90% and the PM peak hour
pass-by rate for Land Use 938 is 98%. For this analysis, the weekday and peak hour pass-by rates
were assumed to be 90%.
Data from ITE Land Use 932. “High-Turnover (Sit-Down) Restaurant,” was used to forecast the number
of existing trips generated by the former restraint use occupying the site.
Table 1 summarizes the trip generation forecast.
Table 1. Trip Generation
Land Use Trip Total Pass-By Non-Pass-By Trips
Rate Trips Rate In Out Total
Former Restaurant 107.20 (318) 43% (91) (90) (181)
Proposed Coffee Shop 533.57 1281 90% 79 79 158
Net New Weekday Trips 963 (12) (11) (23)
Former Restaurant 9.57 (28) 43% (9) (7) (16)
Proposed Coffee Shop 85.88 206 90% 13 12 25
Net New AM Trips 178 +4 +5 +9
Former Restaurant 9.05 (27) 43% (9) (6) (15)
Proposed Coffee Shop 38.99 94 90% 6 6 12
Net New PM Trips 67 (3) 0 (3)
The project is forecast to generate no new weekday daily or PM peak hour non-pass-by trips. The
project is forecast to generate 9 new AM peak hour trips to public street network.
The City’s Policy Guidelines for Traffic Impact Analysis for New Development require formal traffic
analyses for new development generating 20 or more new peak hour trips. The proposed project
generates less than 20 peak hour trips.
Figure 3 illustrates the project’s AM and PM trip distribution and peak hour assignment.
• Given the width and volume of vehicles on Sunset Blvd N, it is assumed that there will be no
left-turns entering or exiting the site during the peak hours.
• All pass-by trips are assumed to/from Sunset Blvd N.
• Most project traffic is assumed to/from I-405 southbound.
5510 15 th St E
Fife, WA 98424
253.267.8650
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Figure 3. Peak Hour Trip Distribution and Assignment
5510 15 th St E
Fife, WA 98424
253.267.8650
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Traffic Conditions
Sunset Blvd N is classified as a Principal Arterial in the City of Renton and fronts the site to the east.
The roadway is part of SR 900 and provides access I-405 southbound and to I-405 northbound north of
the site and to I-405 southbound at the Bronson Way / Maple Valley Hwy intersection. Sunset Blvd N
has a 7-lane cross-section fronting the site with 4 lanes in the southbound direction and 3 lanes in the
northbound direction. The posted speed is 30 MPH. While not restricted, left-turns from the subject
property off Sunset Blvd N can be challenging due to the number of lanes crossed and volume of
vehicle traffic on Sunset Blvd N.
Bronson Way N is classified as a Principal Arterial in the City of Renton and fronts the site to the south.
The road is part of SR 900. Bronson Way N changes to Maple Valley Hwy (SR 169) east of Sunset
Blvd, the latter includes northbound I-405 ramps. Two westbound lanes of Maple Valley Hwy merge into
Bronson Way from the east and two southbound lanes of Sunset Blvd N merge into Bronson Way from
the north at the site access. The posted speed is 25 MPH. A median restricts access to right-turns only.
The nearest transit stops are north of the site on Sunset Blvd south of N 3rd Street. The stops are
served by King County Metro Route 105, Renton Highlands, Renton, with weekday and weekend
services between Renton Highlands and Renton Transit Center.
A crash history between 2022 and 2024 was reviewed by the WSDOT Crash Portal.
• Near the north driveway, there was one crash reported in 2024, that resulted in a possible injury.
• At Sunset Blvd N & Bronson Way N, there were 13 crashes reported in 2022 and 2023, and 5
crashes reported in 2024, the latter showing significant improvement.
• At Bronson Way N& Factory Ave N, there were 4 crashes reported in 2022 and 2024, and 9
crashes reported in 2023.
Planned public transportation facility improvements near the project site, from the City’s STIP, include:
• Houser Way Bridge – Seismic Retrofit and Painter, across Cedar River. Remove existing
paint from the steel girders, repair corrosion damage and apply a new protective paint system.
Seismic analysis and retrofit and replace/upgrade the bridge rails along with other
improvements. Cost: $2,462,700 (funded). Complete: 2025.
• Houser Way Non-Motorized Improvement, Mill Ave S to Bronson Way N. Install a separated
bike facility on the north side of Houser Way S/N. Improved Cedar River Park Drive and Mill Ave
S intersection crossings. Project includes planning and pavement overlay and channelization
improvements. Cost: $2,187,000 (unfunded). Complete: 2029.
• NE 3rd Street Corridor Improvements, Sunset Blvd N to Jefferson Ave NE. Corridor
improvements to include re-channelization, traffic signal modifications, possible transit priority
signal treatments and queue jumps. Cost: $5,082,500 (unfunded). Complete: 2030+.
5510 15 th St E
Fife, WA 98424
253.267.8650
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Traffic Circulation and Parking
Sight distance was reviewed at the existing driveways per WSDOT guidelines and in the field.
• The stopping sight distance required at the Bronson Way N driveway is 250 feet, based on a 35
MPH assumed design speed. A driver approaching the site from the east on Maple Valley Hwy
can see an object on Bronson Way N at the south driveway from over 250 feet away. The
westbound sightline extends into the Sunset Blvd N signalized intersection. The southbound
right-turn approach from Sunset Blvd N to Bronson Way N is signalized, with no turns allowed
on red. A driver making a right-turn from Sunset Blvd N can see an object south driveway from
the stop bar at Bronson Way N. Shrubbery is recommended to be trimmed along the back of
sidewalk to enhance the stopping sight distance at the south driveway.
• The stopping sight distance required at the Sunset Blvd N driveway is 305 feet, based on a 40
MPH assumed design speed. A driver approaching the site from the north can see an object on
Sunset Blvd N at the north driveway from over 305 feet away. The Sunset Blvd N & Bronson
Way N signalized intersection is within 200 feet south of the north Sunset Blvd N driveway, and
a driver entering the intersection to the north can see object at the north driveway.
• The intersection sight distance required for a stopped driver at the south driveway making a
right-turn on Bronson Way N is 335 feet, based on an assumed 35 MPH design speed. A driver
exiting the south driveway can see a vehicle approaching from the east on Maple Valley Hwy
from over 335 feet away. A driver exiting the driveway can also see vehicles at the southbound
stop bar from Sunset Blvd N to Bronson Way N.
• The intersection sight distance required for a stopped driver at the north driveway making a
right-turn is 385 feet, based on an assumed 40 MPH design speed. A driver exiting the north
driveway can see an approaching vehicle from over 385 feet away on Sunset Blvd.
• The intersection sight distance required for a stopped driver at the north driveway making a left-
turn is 500 feet, based on an assumed 40 MPH design speed. A driver exiting the north
driveway can see an approaching vehicle from the Sunset Blvd N & Bronson Way intersection.
Both stopping and intersection sight distances are adequate at both site accesses.
Chapter 4-4-080.E.10 for the City’s Municipal Code includes the following parking and stacking
requirements:
• Drive-through retail or drive-through service: The drive-through facility shall be so located
that sufficient on-site vehicle stacking space is provided for the handling of motor vehicles using
such facility during peak business hours. Typically, 5.0 stacking spaces per window are required
unless otherwise determined by the Administrator. Stacking spaces cannot obstruct required
parking spaces or ingress/egress within the site or extend into the public right-of-way.
• Eating and drinking establishment combination sit-down/drive-through restaurant: A
minimum and maximum of 1.0 per 75 square feet of dining area.
5510 15 th St E
Fife, WA 98424
253.267.8650
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The site plan includes 10 stacking spaces for the drive-through, which more than satisfies the City’s
Code requirement.
Based on the proposed dining area, the site requires 17 off-street parking spaces. The site plan shows
20 onsite vehicle parking spaces, which exceeds the City’s Code requirement.
The ITE Parking Generation Manual includes an average peak parking demand rate for Land Use 937,
“Coffee/Donut Shop with Drive-Through Window.” of 5.10 vehicles per 1,000 square feet of gross floor
area. The average peak parking demand for the proposed project is 15 vehicles. The site’s 20 off-street
parking spaces are sufficient to accommodate the peak hour demand.
Traffic Mitigation
The City of Renton assesses Transportation Impact Fees (TIFs) for new development/redevelopment. A
“Coffee/Donut Shop, with drive up” has a TIF rates of $211.59 per square foot. A “Restaurant: sit-down”
has a TIF rates of $56.02 per square foot. The project’s TIF is estimated below:
• Coffee/Donut Shop. $211.59 per square foot X 2,970 square feet = $628,422.30
• Restaurant: sit-down. $56.02 per square foot X 2,970 square feet = $166,379.40 (Credit)
• Total Estimate: $462,042.90