17-105489-Autoturn Analysis Memo-11-12-2021-V1 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 12, 2021
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 three (3) of the four
(4) driveways shall be used for truck operations. 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
Site Access 3 To/From North (I-5): Right turn entering/left turn exiting
See ATTACHMENT A for all AutoTurn figures discussed above.
Memorandum – IRG Woodbridge Business Park
AutoTurn Analysis
TENW
November 12, 2021
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.
TENW has concluded that no design revisions are needed to the three 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 12, 2021
Page 3
Preliminary Site Plan
Memorandum – IRG Woodbridge Business Park
AutoTurn Analysis
TENW
November 12, 2021
Page 4
ATTACHMENT A
AutoTurn Figures
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
3
10/01/2021 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
111-12-2021
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
3
10/01/2021 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
211-12-2021
VEHICLE BODY ENVELOPE
FRONT TIRE PATH
REAR TIRE PATH
LEGEND
DATE:
OF
3
10/01/2021 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 3
AUTOTURN EXHIBIT
311-12-2021