HomeMy WebLinkAboutSD-23-05 - Supplemental - 0760 Shelburne Road (49)1
Marla Keene
From:Erica Quallen
Sent:Tuesday, May 30, 2023 8:22 AM
To:Marla Keene
Subject:RE: SD-23-05 760 Shelburne Rd - updated traffic study
Hi Marla – The revisions look good to me and I’m comfortable with this traffic study as revised. I’ll take a look at the site
plan comments later today and get back to you in that email thread.
Thanks!
Erica
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From: Marla Keene <mkeene@southburlingtonvt.gov>
Sent: Thursday, May 25, 2023 4:32 PM
To: Erica Quallen <equallen@southburlingtonvt.gov>
Subject: SD-23-05 760 Shelburne Rd - updated traffic study
Hi Erica,
The team working on 760 Shelburne Road sent some revised materials (but not everything the Board has asked for)
yesterday. I am disappointed they didn’t include a narraƟve describing their revised submission, and I’m asking for one
to address your site comments, but one of the things they included was a revised traffic study. Could you possibly
review the revised traffic study to evaluate whether your concerns have been addressed? My sense at the iniƟal review
was they were VERY CLOSE on whether they were exceeding the previous trip generaƟon, which would unlock all sorts
of challenges for them, and I was concerned that modifying to address your comments would flip them over into the
addiƟonal new trips territory. In terms of Ɵmeline, if you could get your comments to me on Tuesday, I can include it in
my packet on Wednesday. If there is anything that makes sense to talk over, please feel free to call!
Your original comments:
1. The background traffic growth factor was calculated to be -5.2% between 2016 and 2029 (page 2). It doesn’t
seem reasonable that traffic would decrease more than 5% in the 13-year Ɵme frame). I did not calculate that
growth rate when looking at the RedBook values and instead got a much smaller decrease (~2% decrease). If a
conservaƟve growth rate of 0% was used, what would the resulƟng LOS at the intersecƟon be in the build
condiƟons?
a. I’m not necessarily concerned about the LOS, but would want to see a more conservaƟve approach.
2. Were pedestrian calls on the intersecƟon considered? I don’t see a pedestrian phase in the Synchro outputs. Even
if the number of calls is small, it would be good pracƟce to always include pedestrians in the analysis as ped
volumes increase Citywide.
2
3. Please show the 95th percenƟle queues on all approaches during AM and PM Peak
Project folder: SD-23-05_760 Shelburne Road_Bourne_2023-03-07
File: Bourne Traffic Impact Assessment (Revised 2023 0323).pdf
Marla Keene, PE
Development Review Planner
City of South Burlington
180 Market Street
South Burlington, VT 05403
(802) 846-4106
www.southburlingtonvt.gov
Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters
concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which
may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by
return email. Thank you for your cooperation.