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cushingterrell.com
June 09, 2021
Development Review Engineer
City of Bozeman
20 E. Olive Street
Bozeman, MT 59715
RE: UPS Bozeman Parcel Distribution Facility Traffic Memo
To whom it may concern:
The purpose of this memo, at the request of the City of Bozeman, is to address the additional traffic
generated from the proposed above-mentioned project and compare to the estimated traffic generated
from the underlying subdivision, Nelson Meadows.
For this analysis, the traffic impact study for the underlying subdivision prepared by Morrison Maierle (Traffic
Impact Study Park Place Industrial Park, June 2018) was utilized. Table 2 of this report (shown below)
provides an overall calculation summary of the trip generation for the subdivision.
According to the Traffic Impact Study, the values in the table above were calculated using trip generation
rates found in Trip Generation, 10th Edition by the ITE. The number of units used in this calculation is
estimated based on a percentage of overall property square footage. Utilizing the same methodology for the
subject property, the gross floor area anticipated for Lot 1A is as follows:
Lot Area (Lot 1A) = 404,323 SF
Buildable Area = (93%) x (Lot Area) = 376,020 SF
Anticipated Gross Floor Area = (20%) x (Buildable Area) = 75,204 SF
Using the anticipated gross floor area for Lot 1A as a fraction of the total subdivision, the estimated trip
generation values are as follows:
Enter Exit Total Enter Exit Total Enter Exit Total
Lot 1A 75.2 144 144 287 35 8 43 8 31 40
Originally Anticipated Traffic Generation Summary (Based on Underlying TIS)
Property Units
Average Weekday Trips Average Weekday, AM Peak
Hour Trips
Average Weekday, PM Peak
Hour Trips
2
cushingterrell.com
The actual proposed gross floor area for the project site is 35,100 SF. As such the trip generation values were
updated using the same ratios in the table below:
Lastly, estimated traffic values provided by UPS for the purpose of pavement design were used to estimate
traffic generation values which are summarized in the table below. Additionally, the anticipated traffic
distribution during the peak hour is approximately 40 employees arriving in personal vehicles near 8 am and
leaving around 9:30 in package delivery cars. The PM hours is more difficult to predict as employees will all
be returning at different times.
As shown in comparing the above tables, the estimated values calculated are anticipated to be less than that
of what the underlying subdivision calculated. Furthermore, the TIS includes warrant conditions for
intersection improvements (traffic light) at Nelson Rd and Frontage Rd. It is concluded that approximately
85% of the subdivision can be developed before satisfying the warrant for the intersection improvements. It
is anticipated that the development of the subject property will be completed prior to Nelson Meadows
reaching this threshold.
Sincerely,
Adam Schlegel, PE
Civil Engineer
cc: UPS_BOZEMAN File
Enter Exit Total Enter Exit Total Enter Exit Total
Lot 1A 35.1 67 67 134 16 4 20 4 15 19
Traffic Generation Summary (Based on Proposed Building)
Property Units
Average Weekday Trips Average Weekday, AM Peak Average Weekday, PM Peak
Enter Exit Total
Lot 1A 35.1 113 112 225
Property Units
Average Weekday Trips
Traffic Generation Summary (Based EALs used for Pavement Desgin)