HomeMy WebLinkAbout010 Traffic Impact Study WaiverFrom: Taylor Lonsdale <tlonsdale@BOZEMAN.NET>
Sent: Tuesday, July 25, 2023 4:12 PM
To: Elizabeth Mans
Cc: Lance Lehigh; Jacob Doesschate
Subject: RE: [EXTERNAL]23168 The Boötes - Traffic Impact Study Waiver
Aachments: ATT00001.txt; ATT00002.htm
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Good a=ernoon Liz. Thank you for reaching out to me on this. The previous TIS covered approximately
48 acres of poten@al development. It assumed 183 single family dwelling units or approximately 3.8
DU/acre. The proposed Boötes site plan sits on approximately 4.8 acres and proposes 71 units or almost
15 DU/acre. While the trip genera@on per unit is lower, with the increased density proposed, the overall
trip genera@on for the area covered by the original TIS would be significantly greater if it con@nues to
develop out at the higher density. The original TIS calculate 181 PM peak hour trips or 3.8 trips per acre.
The proposed Boötes development will generate 8.3 trips per acre. It is important to note that future
development on the remaining lots within Allison Ph 4 will be evaluated individually and the cumula@ve
impact will be considered. If development at higher densi@es con@nues with future applica@ons, a
revised TIS will be required. Addi@onally, the original TIS from 2019 is star@ng to be dated and
depending on @ming, future applica@ons may be required to update the TIS simply based on the @me
since the original TIS was completed.
The trip generaon for the Boötes remains within th e overall trips evaluated in the TIS for Allison Ph 4
and the City of Bozeman therefore grants a waiver of the required TIS for this applicaon.
I have copied Jake Doesschate on this email. He is the Development Review Coordinator for this project.
If you have further ques@ons please be sure to route them through Jake. Thank you.
Taylor Lonsdale, PE | Transportation Engineer
City of Bozeman
O: 406.582.2286
pronouns: he\him\his
From: Elizabeth Mans <emans@wwcengineering.com>
Sent: Thursday, July 20, 2023 10:56 AM
To: Taylor Lonsdale <tlonsdale@BOZEMAN.NET>
Subject: [EXTERNAL]23168 The Boötes - Traffic Impact Study Waiver
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Hi Taylor,
I wanted to inquire if a new Traffic Impact Study (TIS) will need to be included in the Site Plan submiNal
of The Boötes development project.
The Boötes is located within the Allison Subdivision Phase 4 which had a TIS completed in March 2019.
The TIS assumed 183 single-family dwelling at a trip genera@on rate of 0.99 trips/unit for PM Peak Hour
(Trip Genera@on Manual, 10th Edi@on) resul@ng in 181 PM Peak Hour trips. The proposed Boötes
development contains 71 mul@-family units, using a trip genera@on rate of 0.56 trips/unit this would
equate to 39.76 PM Peak Hour trips.
Currently there are 40 single-family lots subdivided within Allision Subdivision, the Boötes development
proposes 71 mul@-family units, and including the suspected occupancy levels of the future phases, the
assumed 183 single-family dwellings in the TIS remains an accurate es@ma@on. Even if the subdivision
ends up suppor@ng more than 183 single-family dwellings, the impact on the TIS will be insignificant as
the assumed trip genera@on rate of 0.99 trips/unit es@mated a worst case scenario PM Peak hour Trips
more severe than what would be calculated with the Mul@-family Housing (low rise) trip genera@on rate
of 0.56 trips/unit.
I have included the Allison Subdivision Phase 4 TIS as a reference as well as the The Böotes concept plan
narra@ve.
Please let me know if you have any ques@ons or need any other informa@on.
Thanks,
Liz
Liz Mans, EI | Associate Civil Engineer
She/her
895 Technology Blvd, Suite 203 | Bozeman, MT 59718
Tel 406-586-0262
emans@wwcengineering.com