HomeMy WebLinkAbout16 - Traffic Impact Study - West Winds Southwest Traffic Investigation
Report
West Winds Southwest
Bozeman, Montana
April 15, 2016
Prepared For:
Haystack Development
PO Box 1793
Bozeman, MT 59771
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Civil Engineering GeOtechnical Engineering Land Surveying 4rse NO e
32 Discovery Drive Bozeman MontanaI . .
Haystack Development Project:16-003
April 15,2016
1 Introduction/Background
The project site is located within the overall West Winds Development and has been considered as part
of previous traffic studies. The attached Figures 1 and 2 show the location of the project site and the
phasing of the currently proposed improvements. The project site was included with the planning for
portions of the original Phase 4 and Phase 5 of the West Winds Development. As part of West Winds
Subdivision Phase 5, a Traffic Impact Study 2008 Update was completed by KHM Engineering. The
purpose of that study was to update previous traffic studies completed for the West Winds
Development. As detailed herein, the currently proposed condominium project will generate less traffic
than that previously analyzed for the Phase 4 and Phase 5 vicinities in the HKM studies.
The proposed improvements include 50 condo units all to be located north of Breeze Lane within the
project site. An overview of the proposed improvements is shown on Figure 2. Breeze Lane will be
constructed from Davis Lane to Windward Avenue; the north-south street/drive lanes will be extended
from Winter Park Street to Breeze Lane and will be extended south as part of future improvements
which are not part of this submittal. Turn movements for the intersection of Breeze Lane and Davis
Lane are shown on Figure 3.
The overall impacts of the site have been evaluated within the West Winds Subdivision Traffic Impact
Study 2007 Update and the Traffic Impact Study Update for West Winds Planned Community Phase 5 by
HKM. An updated Transportation Master Plan is currently being completed for the City of Bozeman and
will consider the overall transportation network. Therefore, the purpose of this evaluation is for initial
evaluation of the proposed intersection of Breeze Lane and Davis Lane. Known issues surrounding the
site have been previously identified and are summarized in the following section.
2 Current Issues and Planned Improvements
A number of transportation network improvements have been identified as part of the Transportation
Master Plan currently being completed. The Improvements are identified in the City of Bozeman Capital
Improvement Plan with more recent updates to the Capital Improvements identified on the Bozeman
Transportation Master Plan website in the interactive mapper as Committed Projects. The committed
projects are shown in Figure 2-1, and a summary of the improvements is provided in Table 2-1. Issues
identified near the project site are planned for improvement within the next two years based on the City
of Bozeman Capital Improvement Plan—Fiscal Years 2017-2021.
Table 2-1-Capital Improvement Plan Projects
Project Name Project ID Fiscal Year
Oak(New Holland to Ferguson) SIF046 18
Baxter(19th to Davis) SIF055 17
Oak and Ferguson (Intersection) SIF061 18
N. 27th and Oak(Intersection) SIF058 18
Bozeman Office . 32 Discovery Drive . Bozeman,Montana 59718 . Ph:(406)582-0221 . Fax:(406)582-5770
Stanley Office . 299 Prairie Drive . PO Box 1251 . Stanley,North Dakota 58784 . Stanley Ph:(701)629-0245 Page 1
Haystack Development Project:16-003
April 15,2016
Legend
CommittedProjects—Intersections
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Figure 2-1-CIP Overview
3 Trip Generation
The proposed site development project includes a total of 50 condo units consisting of single unit and
duplex structures. Trip generation for the proposed site development is provided in Table 3-1. The
generation is based on Trip Generation 71h Edition —Institute of Transportation Engineers (ITE). While a
number of units are shared structures, the use is generally intended as small single family units. The
Single-Family Detached Housing land use is utilized but is considered conservative due to the higher
peak hour rates when compared to Residential Condominium/Townhouses which may also fit the
proposed land use.
Bozeman Office . 32 Discovery Drive . Bozeman,Montana 59718 . Ph:(406)582-0221 . Fax:(406)582-5770
Stanley Office . 299 Prairie Drive . PO Box 1251 . Stanley,North Dakota 58784 . Stanley Ph:(701)629-0245 Page 2
Haystack Development Project:16-003
April 15,2016
Table 3-1-Trip Generation-Proposed
Daily
AM Peak Hour PM Peak Hour
Land Use ITE Units Weekday
Code % % Trips Trips % % Trips Trips
Rate Trips Rate Trips In Out In Out Rate Trips In Out In Out
Single-
Family 210 50 9.57 479 0.77 39 26 74 10 29 1.02 51 64 36 33 18
Detached
Housing
4 Capacity
The improvements currently proposed include only a portion of the development area previously
accounted for in earlier traffic studies. The proposed condominium project also generates less traffic
volume than what was originally considered for the remaining undeveloped area. Additionally, a
portion of New Holland Drive will be constructed providing means of traffic distribution within the local
street network. The configuration that had been planned for Breeze Lane in the original Phase 5 is being
maintained as a right in right out only where it connects with Davis Lane.
5 Summary
The project site was included within the planning for Phases 4 and 5 of the original West Winds
Development. The local street configuration within the project site has been maintained for Breeze
Lane with the connection to Davis Lane. In addition, New Holland Drive is included in the proposed
improvements from Winter Park Street to Breeze Lane, improving the local street distribution network.
Trip generation for the proposed condo development is less than what was originally included for the
overall development area.
A number of offsite improvements are planned to maintain acceptable levels of services. The
improvements have been identified in Table 2-1 (above) along with the capital improvement project
associated with the improvement. All improvements are planned to occur by fiscal year 2018, within
the next two years.
Bozeman Office . 32 Discovery Drive . Bozeman,Montana 59718 . Ph:(406)582-0221 . Fax:(406)582-5770 Page 3
Stanley Office . 299 Prairie Drive . PO Box 1251 . Stanley,North Dakota 58784 . Stanley Ph:(701)629-0245
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,.,r,u1^``° TRAFFIC EXHIBIT