HomeMy WebLinkAboutEx_08_WSDOT_Comment__2DOT Form 700-008 EF
Revised 5/99
August 4, 2021
TO: Ramin Pazooki / Duffy McColloch
Sno-King Development Services, MS 240
FROM: Mike Swires / Maan Sidhu / Christian Asuncion
NWR - King Area Traffic Analysis, MS 120
SUBJECT: I-405 Amazon Distribution Facility
City of Renton
Traffic Impact Analysis
WSDOT NW Region Traffic has reviewed the Traffic Impact Analysis (TIA) for the
Amazon Distribution Facility in the City of Renton submitted July 2021. The proposed
distribution facility will occupy an existing 114,850 square foot building and is planned
to be constructed in 2021 at a limited capacity, with full capacity by 2024. Comments to
the plans are offered as follows.
General
Thank you for including select state highway intersections in the updated TIA. From the
analysis, it appears the proposed development will incur several state highway
intersections that will exceed the 25 AM/PM peak threshold. This will require further
analysis of the state highway intersections using WSDOT manuals and guidance. The
following comments outlines the further analysis with reference to WSDOT manuals and
guidance for analyzing state highway intersections.
If there are any questions about process or details within the WSDOT Design Manual
and/or the Development Services Manual, please feel free to reach out to WSDOT Local
Agency and Development to schedule a meeting.
1. As we stated in the first comment memo, we are particularly interested in the
intersections proximate to I-405/SR 167 and I-405/SR 181; however, the impact
to intersections on state highway facilities with 25 added trips or greater needs
to be analyzed per the Development Services Manual Chapter 4.
Please identify all intersections with 25 added trips or greater and include in the
analysis
2. For existing analysis, please do not include any projects that are not already
under construction.
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I-405 Amazon Distribution Facility TIA Date 8/4/2021
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For future no-build, please do not include any projects that are not already
funded and on a comprehensive plan or transportation improvement plan.
3. For analysis of development impacts within a traffic impact analysis, please see
WSDOT Design Manual Chapter 320.10(1)(d) “Traffic Analysis” and
Development Services Manual Chapter 4.
4. For the traffic analysis and models, please use Synchro/SimTraffic per WSDOT
Design Manual Chapter 320.08 “TIA Methodologies” and the WSDOT Traffic
Analysis Guidebook. CAP-X is not included in the approved traffic analysis
software.
5. Please provide a safety analysis per WSDOT DM 320.10(1)(d) “Traffic
Analysis.” Please see Design Manual Chapter 321 Sustainable Safety Analysis
and the Safety Analysis Guide Section 8.3. The safety analysis can be a "basic
level" analysis that reviews and tabulates 5 year crash history that identifies any
safety issues.
6. For potential mitigation, please see WSDOT Design Manual Chapter 320.09
“TIA Mitigation Measures,” Chapter 320.10(1)(e) “Conclusions and
Recommendations,” and Development Services Manual Chapter 4.
If there are any questions, please feel free to coordinate a meeting with Local Agency and
Development Services.
MS: ms: ca
Attachments:
cc: File
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