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Transportation Engineering NorthWest
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
MEMORANDUM
DATE: September 26, 2016
TO: Ann Fowler
City of Renton Public Works Plan Reviewer
FROM: Chris Forster, P.E.
TENW
SUBJECT: Renton Firestone – Trip Generation
PRE16-000342
TENW Project No. 5313
This memorandum summarizes the preliminary traffic information for the proposed Firestone Complete Auto
Care project located at 17808 108th Ave SE in Renton, Washington. This memo includes a project
description and trip generation estimate. We are requesting your review and approval of this information
and confirmation that a traffic impact analysis will not be required for this project.
Project Description
The Renton Firestone site is located on the east side of 108th Ave SE (17808 108th Ave SE, see site vicinity
map in Attachment A). The existing site includes a fast-food restaurant with drive-through window (Skippers)
totaling 2,200 square feet, which would be removed. The proposed Firestone Complete Auto Care project
would include up to 7,700 square feet of tire sales/auto care use. Access to the Firestone project is proposed
to be provided via one right-in, right-out only driveway on 108th Ave SE in approximately the same location
as the existing driveway to Skippers. A preliminary site plan is provided in Attachment B. The project is
expected to be occupied in 2017.
Trip Generation
The trip generation estimates for the proposed Firestone project were based on methodology in the Institute
of Transportation Engineers (ITE) Trip Generation Manual, 9th edition, for Tire Store (LUC 848) and Fast-Food
Restaurant with Drive-Through Window (LUC 934). The net new trip generation was calculated by subtracting
the trips from the restaurant to be removed from the trips generated by the proposed Firestone. The resulting
net new weekday daily, AM and PM peak hour trips are summarized in Table 1. A detailed trip generation
estimate is included in Attachment C.
Table 1
Renton Firestone
Trip Generation Summary
Trips Generated
Time Period In Out Total
Weekday Daily -203 -204 -407
Weekday AM Peak Hour 10 6 16
Weekday PM Peak Hour -9 -4 -13
Renton Firestone – Trip Generation
TENW September 26, 2016
Page 2
As shown in Table 1, the proposed Firestone project is estimated to result in a net reduction in weekday daily
trips (-407 trips) with 16 net new trips occurring during the weekday AM peak hour (10 entering, 6 exiting),
and a net reduction of net new trips (-13 trips) occurring during the weekday PM peak hour (-9 entering, -4
exiting). As a conservative assumption, no credit was taken for trips from the existing restaurant during the
AM peak hour as the current restaurant (Skippers) opens after 9 AM.
Next Steps
The proposed Renton Firestone project would generate less than 20 net new trips during the weekday AM
and PM peak hours. Therefore, based on the City’s guidelines, no additional traffic analysis is required for
this development. We look forward to your review and approval of our trip generation estimates and
consensus that no additional traffic analysis is necessary.
If you have any questions, please feel free to contact me at (206) 498-5897 or forster@tenw.com.
cc: Luke Randals, P.E., Pacland
Attachments
Renton Firestone – Trip Generation
ATTACHMENT A
Vicinity Map
Renton Firestone – Trip Generation
ATTACHMENT B
Preliminary Site Plan
Renton Firestone – Trip Generation
ATTACHMENT C
Trip Generation Estimate
ITE
Land Use LUC 2 In Out Trip Rate In Out Total
DAILY
Proposed Use:
Tire Store 7,700 sf 848 50%50%24.87 95 96 191
Passby 3 28%-26 -27 -53
69 69 138
Less Existing Use:Fast-Food Restaurant with Drive-Through Window 2,200 sf 934 50%50%496.12 545 546 1,091
Passby 3 50%-273 -273 -546
272 273 545
TOTAL NET NEW DAILY TRIP GENERATION -203 -204 -407
AM PEAK HOUR
Proposed Use:
Tire Store 7,700 sf 848 63%37%2.89 14 8 22
Passby 3 28%-4 -2 -6
10 6 16
Less Existing Use:
Fast-Food Restaurant with Drive-Through Window 4 2,200 sf 934 51%49%0.00 0 0 0
Passby 3 49%0 0 0
0 0 0
TOTAL NET NEW AM PEAK HOUR TRIP GENERATION 10 6 16
PM PEAK HOUR
Proposed Use:Tire Store 7,700 sf 848 43%57%4.15 14 18 32
Passby 3 28%-4 -5 -9
10 13 23
Less Existing Use:
Fast-Food Restaurant with Drive-Through Window 2,200 sf 934 52%48%32.65 37 35 72
Passby 3 50%-18 -18 -36
19 17 36
TOTAL NET NEW PM PEAK HOUR TRIP GENERATION -9 -4 -13
Notes:
1 sf GFA
2 Institute of Transportation Engineers, Trip Generation Manual, 9th Edition, 2012 Land Use Codes.
3 Passby percent based on studies documented in the ITE Trip Generation Handbook, 3rd Edition, August 2014. Daily is average of AM and PM.4 Restaurant was conservatively assumed to not be open during the AM peak hour and therefore generate no trips.
ATTACHMENT C
Renton Firestone Trip Generation
Directional Split Trips Generated
Units 1