17-105489-Auto Turn Analysis-02.16.23 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: November 30, 2022
TO: Laura Bartenhagen
ESM Consulting Engineers
FROM: Danielle Allen
TENW
SUBJECT: AutoTurn Analysis
Project Name: IRG Woodbridge Business Park
TENW Project No. 5219
ESM Consulting Engineers has requested that TENW prepare an AutoTurn analysis for the Woodbridge
Business Park development in the City of Federal Way, Washington. The Business Park project is located
between I-5 and Weyerhaeuser Way S, north of S 336th Street and south of S 323rd Street. Vehicular
access to the development is proposed at four locations along Weyerhaeuser Way S.
The purpose of this memorandum is to confirm the capabilities of truck access to/from the project site.
The design vehicle for all turning movements analyzed in this study was assumed to be a WB-67. Based
on site operations, it is assumed that two (2) of the four (4) driveways shall be used for truck operations.
In addition, the City of Federal Way is requiring for the two site access points to have right turn pockets
in order to remove turning trucks from the thru lanes. The results of our analysis are summarized below.
Results
TENW modeled the following WB-67 turning movements for the Woodbridge Business Park driveway
accesses using AutoTurn Pro 11.0 software:
Site Access 1 To/From North (I-5): Right turn entering/left turn exiting
Site Access 2 To/From North (I-5): Right turn entering/left turn exiting
TENW also modeled the following WB-67 turning movements for the roundabouts approaching the
development:
S 336th/Weyerhaeuser Way S Roundabout: Through NB/Through SB
33rd Place/ Weyerhaeuser Way S Roundabout: Through NB/Through SB
See ATTACHMENT A for all AutoTurn figures discussed above.
Memorandum – IRG Woodbridge Business Park
AutoTurn Analysis
TENW
November 30, 2022
Page 2
Conclusions
It was assumed that the WB-67 truck must remain in its given lane when exiting or entering each
driveway, no encroachment into bike lanes or two-way-left-turn lanes shall be allowed. Given all
assumptions discussed within this memorandum, the analysis demonstrates that all three driveways can
accommodate a WB-67 maneuvering in/out of the driveway as currently designed. In addition, both
roundabouts can accommodate the WB-67 vehicle movements without conflicts.
TENW has concluded that no design revisions are needed to the two existing roundabouts S
336th/Weyerhaeuser Way S and 33rd Place SE/Weyerhaeuser Way S, and two driveways along
Weyerhaeuser Way S in order to accommodate a simultaneous in/out movement of a WB-67 vehicle
at each driveway.
Please contact me with any questions at (425) 250-0584 or danielle@tenw.com
Sincerely,
Transportation Engineering NorthWest
Danielle Allen, P.E.
Project Manager
Memorandum – IRG Woodbridge Business Park
AutoTurn Analysis
TENW
November 30, 2022
Page 3
Preliminary Site Plan
Memorandum – IRG Woodbridge Business Park
AutoTurn Analysis
TENW
November 30, 2022
Page 4
ATTACHMENT A
AutoTurn Figures
153
154
155
156
157
158
159
160
161
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
4
11/30/2022 TENW
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
Transportation Engineering NorthWest
Project Contact: Danielle Allen
Phone: 425-250-0584
BUSINESS PARK
FEDERAL WAY, WASHINGTON
0
HORIZONTAL SCALE
IN FEET
40
N
SHEET
Steering Angle
Lock to Lock Time
Articulating Angle
WB-67
Trailer Track
Tractor Track
Trailer Width
Tractor Width
19.504.00
feet
8.50
8.50:
8.00
8.00
:
:
:
0.00
3.00 45.50
15.00 53.00
:
:
:6.0
28.4
75.0
WB-67 SB RIGHT IN & NB LEFT OUT
SITE ACCESS 1
AUTOTURN EXHIBIT
1
40'
169
170
171
172
173
174
175
176
177
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
4
11/30/2022 TENW
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
Transportation Engineering NorthWest
Project Contact: Danielle Allen
Phone: 425-250-0584
BUSINESS PARK
FEDERAL WAY, WASHINGTON
0
HORIZONTAL SCALE
IN FEET
40
N
SHEET
Steering Angle
Lock to Lock Time
Articulating Angle
WB-67
Trailer Track
Tractor Track
Trailer Width
Tractor Width
19.504.00
feet
8.50
8.50:
8.00
8.00
:
:
:
0.00
3.00 45.50
15.00 53.00
:
:
:6.0
28.4
75.0
WB-67 SB RIGHT IN & NB LEFT OUT
SITE ACCESS 2
AUTOTURN EXHIBIT
2
40'
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
4
11/30/2022 TENW
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
Transportation Engineering NorthWest
Project Contact: Danielle Allen
Phone: 425-250-0584
BUSINESS PARK
FEDERAL WAY, WASHINGTON
0
HORIZONTAL SCALE
IN FEET
40
N
SHEET
Steering Angle
Lock to Lock Time
Articulating Angle
WB-67
Trailer Track
Tractor Track
Trailer Width
Tractor Width
19.504.00
feet
8.50
8.50:
8.00
8.00
:
:
:
0.00
3.00 45.50
15.00 53.00
:
:
:6.0
28.4
75.0
WB-67 NB & SB THRU
RAB WEYERHAEUSER WAY S & S 336TH ST
AUTOTURN EXHIBIT
3
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
4
11/30/2022 TENW
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
Transportation Engineering NorthWest
Project Contact: Danielle Allen
Phone: 425-250-0584
BUSINESS PARK
FEDERAL WAY, WASHINGTON
0
HORIZONTAL SCALE
IN FEET
40
N
SHEET
Steering Angle
Lock to Lock Time
Articulating Angle
WB-67
Trailer Track
Tractor Track
Trailer Width
Tractor Width
19.504.00
feet
8.50
8.50:
8.00
8.00
:
:
:
0.00
3.00 45.50
15.00 53.00
:
:
:6.0
28.4
75.0
WB-67 NB & SB THRU
RAB WEYERHAEUSER WAY S & S 33RD PL S
AUTOTURN EXHIBIT
4