011 Trip Generation Analysis TENW
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 19, 2017
TO: Rick Perez / Sarady Long
City of Federal Way
FROM: Jeff Schramm
TENW
SUBJECT: Trip Generation Memo for the proposed
IRG Greenline – Federal Way
TENW Project #5219
This memorandum documents the trip generation estimate for the proposed IRG Greenline in Federal Way,
WA and includes a project description and trip generation estimate.
Project Description
The project site is located on the west side of Weyerhaeuser Way S, east of I-5, and north of the proposed
IRG Warehouse A and Warehouse B developments. A vicinity map of the surrounding area is shown in
Attachment A. The project includes the development of up to 1,068,000 square feet of warehouse building
area. The existing site is vacant.
Primary vehicular access is proposed at three locations along Weyerhaeuser Way S. Project buildout is
expected in 2020. A preliminary site plan concept is shown in Attachment B.
Trip Generation
The trip generation estimate for the proposed IRG Greenline industrial development was based on
methodology documented in the Institute of Transportation Engineers (ITE) Trip Generation Manual 9th edition
for LUC 150 (Warehousing). Table 1 summarizes the total trip generation estimate. A detailed trip generation
calculation can be found in Attachment C.
Table 1
Trip Generation Summary
New Trips Generated
(PASSENGER VEHICLES
ONLY)
New Trips Generated
(TRUCKS ONLY)
Total New Trips
Generated
(ALL VEHICLES)
Time Period In Out Total In Out Total In Out Total
Daily 1,511 1,512 3,023 378 378 756 1,889 1,890 3,779
AM Peak Hour 192 51 243 48 13 61 240 64 304
PM Peak Hour 55 162 217 13 41 54 68 203 271
As shown in Table 1, the IRG Greenline industrial development is estimated to generate 3,779 new weekday
daily trips with 304 new trips during the weekday AM peak hour (240 in, 64 out) and 271 new trips during
the weekday PM peak hour (68 in, 203 out).
Trip Generation Memo
IRG Greenline
TENW September 19, 2017
Page 2
If you have any questions regarding the information presented in this memo, please call me at (425) 250-
5001 or email me at schramm@tenw.com.
cc: Tom Messmer – IRG
Eric LaBrie, ESM Consulting Engineers
Jeff Haynie, P.E. – TENW Principal
Attachments: A. Project Site Vicinity
B. Preliminary Site Plan
C. Trip Generation Calculation
Trip Generation Memo
IRG Greenline
ATTACHMENT A
Vicinity Map
Trip Generation Memo
IRG Greenline
ATTACHMENT B
Preliminary Site Plan
Trip Generation Memo
IRG Greenline
ATTACHMENT C
Trip Generation Calculations
ITE
Land Use Units 1 LUC 2 In Out Trip Rate In Out Total
Truck Trip
Percentage 2 Enter Exit Total Enter Exit Total
Daily
Proposed Use:
Warehouse 1,068,000 GFA 150 50%50%eqn 1,889 1,890 3,779 20%378 378 756 1,511 1,512 3,023
Net New Daily Trips = 1,889 1,890 3,779 378 378 756 1,511 1,512 3,023
AM Peak Hour
Proposed Use:
Warehouse 1,068,000 GFA 150 79%21%eqn 240 64 304 20%48 13 61 192 51 243
Net New AM Peak Hour Trips = 240 64 304 48 13 61 192 51 243
PM Peak Hour
Proposed Use:
Warehouse 1,068,000 GFA 150 25%75%eqn 68 203 271 20%13 41 54 55 162 217
Net New PM Peak Hour Trips = 68 203 271 13 41 54 55 162 217
Notes:
2 Land Use Code and trip rates based on ITE Trip Generation Manual, 9th Edition, 2012.
1 GFA = Gross Floor Area.
Non-Truck Trip GenerationTruck Trip Generation
IRG Federal Way - Greenline
Trip Generation Summary
Directional Distribution Trips Generated
9/19/2017