HomeMy WebLinkAbout04 Trout Meadows Ph3 Trip Generation Memo
MONTANA | WASHINGTON | IDAHO | NORTH DAKOTA | PENNSYLVANIA
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234 East Babcock Street
Suite 3
Bozeman, MT 59715
MEMORANDUM
Date: February 17, 2022 TDH Job No.: B14-008
To: Alicia Paz-Solis, City of Bozeman Engineering
From: Cody Croskey, PE
Subject: Trout Meadows Phase 3 – Peak Hour Trip Generation
Dear Alicia,
In response to your November 22, 2021Transportation comment from the Trout Meadows
Phase 3 Concept Review (App. 21404), I am providing the following peak hour trip
generation information for this project as well as a comparison with the peak hour trips
assumed by the 2006 Cattail Lake Subdivision Traffic Impact Study (TIS).
The Trout Meadows Phase 3 development will consist of 60 apartments in four multi-family
apartment buildings. Information contained in the Institute of Transportation Engineers
(ITE) publication Trip Generation (11th Edition) was used to estimate the following number
of average weekday and peak hour trips that will be generated by the proposed
development.
The original 2006 Cattail Lake Subdivision TIS estimated 178 total AM peak hour trips and
214 total PM peak hour trips for the entire planned 338 unit subdivision (see attached TIS
pages). However, the amended plat for the Trout Meadows Phase 3 Lots removed 11
townhome and 10 single family home lots in-lieu of adding 60 apartment units (see
attached subdivision unit summary map). Additionally, the TIS used the 7th Edition of the
ITE Trip Generation Manual and the 11th Edition is now available with more current data.
Therefore, the following updated trip generation estimates have been calculated using the
latest ITE Trip Generation Manual and subdivision unit configuration including the Trout
Meadows Phase 3 apartments.
February 17, 2022 PAGE NO. 2
tdhengineering.com
The updated 152 total AM peak hour trips and 194 total PM peak hour trips are less than
what was assumed in the 2006 Cattail Lake Subdivision TIS when evaluating impacts to
surrounding street infrastructure.
Please let me know if you have any questions or require any additional information.
Sincerely,
Cody Croskey PE
Civil Engineer
TD&H ENGINEERING
Attachments:
• Pages from the 2006 Cattail Lake Subdivision TIS
• Unit summary Map for the Cattail Lake Subdivision
CRESTVIEW AT CATTAIL LAKE
Traffic Impact Study
Prepared for:
Crestview Lake, LLC.
7403 Highline Ct.
Missoula, MT 59808
APRIL 2006
Prepared by:
Crestview at Cattail Lake Traffic Impact Study Page 9
Site-Generated Traffic
The proposed Crestview at Cattail Lake subdivision will consist of approximately 10
single family homes, 28 townhomes, and 300 apartments. Information contained in
the Institute of Transportation Engineers (ITE) publication Trip Generation (7th Edition)
was used to estimate the number of trips that will be generated by the proposed
development. Table 1 shows the results of the trip-generation calculations.
Table 1: Estimated Crestview at Cattail Lake Site-Generated Trips
AM Peak PM Peak
Land Use Size ITE Land Use
Code
Weekday
ADT Enter Exit Enter Exit
Single Family Homes 10 210 96 2 6 6 4
Townhomes 28 230 218 3 16 14 7
Apartments 300 220 1,953 30 121 119 64
Total 2,267 35 143 139 75
Assignment of Site-Generated Trips
Existing traffic patterns throughout the study area were studied to identify commuter
travel patterns. The existing volumes at the study intersections are greatly influenced
by the surrounding commercial land uses during the PM peak hour; therefore,
emphasis was placed on existing peak AM hour volumes. For this traffic analysis it is
estimated that approximately 61% of site-generated peak-hour trips will be destined to
areas on North 19th Avenue south of the site, approximately 11% will be destined to
Belgrade and other points west on East Valley Center Road, approximately 14% will
travel to/from North 19th Avenue north of the site, and approximately 10% will be
destined to/from the business/office park/commercial areas along Catron Street and
within the Cattail Creek adjacent development. The trip distribution pattern for the
Crestview at Cattail Lake subdivision site-generated trips established for this study is
illustrated in Figure 6.
The site-generated trips from Table 1 were distributed to the roadway network in
accordance with the trip distribution patterns. This resulted in the AM and PM peak-
hour, site-generated trips shown in Figure 7.
Total = 178 AM, 214 PM
- 11 Attached Townhomes
+ 24 Apartments
- 10 Detached Single Family
+ 36 Apartments