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Home My WebLink About006 - Traffic Memo cushingterrell.com July 29, 2026 Development Review Engineer City of Bozeman 20 E. Olive Street Bozeman, MT 59715 RE: Whitefish Credit Union – Lot 2A-1 of Minor Subdivision 503C - Traffic Memo To whom it may concern: The purpose of this memo, at the request of the City of Bozeman, is to both address the additional traffic generated and the drive-through lane queuing analysis from the proposed above-mentioned project located at the southwest corner of South 19th Avenue and West Kagy Boulevard. Traffic Generation The proposed development of this site includes a new credit union branch with additional upper floor offices for Whitefish Credit Union employees. For this traffic analysis, the project was separated into two uses, Drive- in Lanes, and Office. The table below provides the calculated combined Weekday, AM Peak and PM Peak hour trips based on ITE Trip Gen 12th Edition. Pass-by trips for this type of development can be discounted from the total calculated trips when considering impacts on adjacent roadways as it is expected that some users will be entering/exiting the site on their way to another destination from the same adjacent roadway. ITE guidance suggests a 35% pass-by rate for Drive-in Banks. The “University Crossing Apartments Traffic Impact Study” report has been included for reference as it has recent traffic counts and level of service for adjacent intersections. Enter Exit Total Enter Exit Total Enter Exit Total Drive-in Lanes 912 3 Lanes 186 186 372 16 11 27 40 41 81 Office 710 11.5 KSF 140 140 279 29 4 33 7 36 43 326 326 651 45 15 60 47 77 124Total Trip Gen 12th Edition (Based on Teller Lane & Office Building) Use Units Average Weekday Trips Peak Hour Adj Street 7-9am Peak Hour Adj Street 4-6pmITE Land Use Code 2 cushingterrell.com Queuing Analysis Based on City of Bozeman standards, a drive-through facility is to have two (2) parking stalls and six (6) spaces per drive-through lane. Based on the current proposed site design, the allocated space for vehicle queuing allows for thirteen (13) vehicles in total for the three proposed teller lanes, which provides approximately 4 vehicles per lane. In this analysis we have looked at the anticipated amount of queuing space needed based on data collected from two other Whitefish Credit Union branches (Missoula and Kalispell) that utilize the same drive-through teller lane design. In these existing locations the teller lanes see on average 9.4 vehicles per day for Missoula, and 22.5 vehicles per day for Kalispell. Theses values indicate that a queuing provided of 13 vehicles at any given time will be sufficient for the amount of vehicles anticipated since this vehicle count is across the full day. Another analysis was conducted using the Trip Generation value listed above for the PM peak hour entering the site (40 trips) at the drive-through, which is approximately 3.2 times greater than the average daily teller lane traffic for the Kalispell branch. Whitefish Credit Union averages just under 2 minutes per drive-up visit. Using this data, and the fact that two of the three teller lanes contain two customer interfaces, the teller lanes as a whole would have the capacity to move a customer through approximately every 24 seconds, or 150 customers an hour which exceeds the total PM peak hour estimate. Based on these analyses, it is expected that the provided space in the proposed site plan for vehicle queuing will be sufficient and vehicles will not back up into the drive lane of the parking lot or right-of-way. If you should require any additional information or clarification, please contact me at AdamSchlegel@CushingTerrell.com or 406.922.7111. Sincerely, Adam Schlegel, PE Civil Engineer cc: WFCU_BOZ File General Office Building (710) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday, Peak Hour of Adjacent Street Traffic, One Hour Between 7 and 9 a.m. Setting/Location:General Urban/Suburban Number of Studies:54 Avg. 1000 Sq. Ft. GFA:170 Directional Distribution:88% entering, 12% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 1.24 0.32 - 2.83 0.40 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average RateFitted Curve Fitted Curve Equation: T = 1.12(X) + 19.95 R²= 0.89 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 200 400 600 800 1,0000 200 400 600 800 1,000 1,200 1,400 1214 33 7/23/26, 3:23 PM itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=TASIDE&x=11.5&edition=806&locationCode=General Ur… https://itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=TASIDE&x=11.5&edition=806&locationCode=General Urban/Suburba…1/1 Drive-in Bank (912) Vehicle Trip Ends vs:Drive-In Lanes On a:Weekday, Peak Hour of Adjacent Street Traffic, One Hour Between 7 and 9 a.m. Setting/Location:General Urban/Suburban Number of Studies:38 Avg. Num. of Drive-In Lanes:4 Directional Distribution:60% entering, 40% exiting Vehicle Trip Generation per Drive-In Lane Average Rate Range of Rates Standard Deviation 8.65 2.80 - 45.00 5.13 Data Plot and Equation T = Trip EndsX = Number of Drive-In Lanes Study Site Average RateFitted Curve Fitted Curve Equation: T = 8.20(X) + 1.92 R²= 0.55 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 5 10 15 200 50 100 150 200 3 26 27 7/23/26, 3:24 PM itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=TASIDE&x=3&edition=806&locationCode=General Ur… https://itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=TASIDE&x=3&edition=806&locationCode=General Urban/Suburba…1/1 General Office Building (710) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday, Peak Hour of Adjacent Street Traffic, One Hour Between 4 and 6 p.m. Setting/Location:General Urban/Suburban Number of Studies:53 Avg. 1000 Sq. Ft. GFA:166 Directional Distribution:16% entering, 84% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 1.18 0.26 - 2.59 0.41 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average RateFitted Curve Fitted Curve Equation: T = 0.99(X) + 31.14 R²= 0.89 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 200 400 600 800 1,0000 200 400 600 800 1,000 1,200 1214 43 7/23/26, 3:22 PM itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=TPSIDE&x=11.5&edition=806&locationCode=General Ur… https://itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=TPSIDE&x=11.5&edition=806&locationCode=General Urban/Suburba…1/1 Drive-in Bank (912) Vehicle Trip Ends vs:Drive-In Lanes On a:Weekday, Peak Hour of Adjacent Street Traffic, One Hour Between 4 and 6 p.m. Setting/Location:General Urban/Suburban Number of Studies:111 Avg. Num. of Drive-In Lanes:3 Directional Distribution:49% entering, 51% exiting Vehicle Trip Generation per Drive-In Lane Average Rate Range of Rates Standard Deviation 26.98 3.00 - 176.00 22.18 Data Plot and Equation T = Trip EndsX = Number of Drive-In Lanes Study Site Average Rate Fitted Curve Equation: Not Given R²= **** Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 5 10 15 200 100 200 300 3 81 7/23/26, 3:24 PM itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=TPSIDE&x=3&edition=806&locationCode=General Ur… https://itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=TPSIDE&x=3&edition=806&locationCode=General Urban/Suburba…1/1 General Office Building (710) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday Setting/Location:General Urban/Suburban Number of Studies:22 Avg. 1000 Sq. Ft. GFA:126 Directional Distribution:50% entering, 50% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 7.83 3.27 - 27.56 3.71 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average RateFitted Curve Fitted Curve Equation: T = 6.18(X) + 207.96 R²= 0.86 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 100 200 300 400 500 6000 1,000 2,000 3,000 4,000 1290 279 7/23/26, 3:24 PM itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=AWDVTE&x=11.5&edition=806&locationCode=General U… https://itetripgen.org/query/PrintGraph2?code=710&ivlabel=QFQAF&timeperiod=AWDVTE&x=11.5&edition=806&locationCode=General Urban/Suburb…1/1 Drive-in Bank (912) Vehicle Trip Ends vs:Drive-In Lanes On a:Weekday Setting/Location:General Urban/Suburban Number of Studies:21 Avg. Num. of Drive-In Lanes:5 Directional Distribution:50% entering, 50% exiting Vehicle Trip Generation per Drive-In Lane Average Rate Range of Rates Standard Deviation 123.01 44.00 - 235.50 55.36 Data Plot and Equation T = Trip EndsX = Number of Drive-In Lanes Study Site Average RateFitted Curve Fitted Curve Equation: T = 121.05(X) + 9.22 R²= 0.56 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 5 10 15 200 500 1,000 1,500 3 369 372 7/23/26, 3:26 PM itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=AWDVTE&x=3&edition=806&locationCode=General U… https://itetripgen.org/query/PrintGraph2?code=912&ivlabel=UNITS912&timeperiod=AWDVTE&x=3&edition=806&locationCode=General Urban/Suburb…1/1