HomeMy WebLinkAbout017 TIS Scoping Letter - Response
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To: Simon Lindley EI, Taylor Lonsdale PE
From: Celine Saucier, Morrison Maierle
Date: October 29, 2025
Job No.: COB #25067
RE: Re: TIS Scope for Velocity Carwash Site Plan
CC:
Urgent For Review Please Comment Please Reply For Your Use
This memo serves to address the remaining items highlighted by Simon from the TIS Scoping
letter provided by the COB on October 28, 2025:
2. Evaluation of the Mall’s private access road with the proposed carwash site access intersection
is required. This intersection should be analyzed as a four-leg intersection and a determination
should be made regarding the appropriate intersection control based on estimated volumes
traveling through the intersection.
The proposed car wash site access has been evaluated in the context of the existing access
road serving the mall. The intersection with the mall’s access drive and Petco/Whole Foods
currently has a stop sign at the minor approach (Petco/Whole Foods).
To maintain consistency and ensure efficient traffic flow, the car wash access has been
revised to include a stop sign, mirroring the existing control on the opposite leg.
Implementing an all-way stop at this location would unnecessarily impede traffic entering
from Huffine Lane and could lead to queuing or congestion on the main thoroughfare.
A two-way stop control at the car wash access is expected to provide safe and efficient
operations, allowing vehicles to enter and exit the site while preserving the flow of traffic
along Huffine and within the mall property.
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Re: TIS Scope for Velocity Carwash Site
Plan
REF #27 Please provide clarification on the following items regarding the Queuing analysis
Report:
The analysis states that a traffic impact study (TIS) was already completed for the development.
Please submit the previously prepared TIS for review. An analysis of the intersection of the
proposed site access with the mall access route and access in front of Petco is of interest to
assess the appropriate intersection control.
The queuing analysis report was incorrect as upon further research by the COB a TIS was
done for Whole Foods and the Gallatin Valley Mall Expansion, neither of which included
the car wash property. A full TIS was not completed for the car wash at the time of those
developments. See #2 for response to the intersection control item as well as attached
revised site plan with stop sign incorporated.