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HomeMy WebLinkAbout006 - Traffic Memo cushingterrell.com April 24, 2026 Development Review Engineer City of Bozeman 20 E. Olive Street Bozeman, MT 59715 RE: Ursus Major – Lot 2A, Block 5, Nelson Meadows Subdivision - 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 2A, Block 5 is as follows: Lot Area (Lot 2A) = 211,963 SF Buildable Area = (93%) x (Lot Area) = 197,126 SF Anticipated Gross Floor Area = (20%) x (Buildable Area) = 39,425 SF Using the anticipated gross floor area for Lot 2A 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 2A 39.4 75 75 151 18 4 22 4 16 21 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 approximately 80,000 SF. As such the trip generation values were updated using the same ratios in the table below: This ratio is comparable to that of an updated Trip Generation, 12th Edition by ITE in which the values are as follows: As shown in comparing the above tables, the estimated values calculated using Trip Gen 12th Edition show a lesser total weekday trips but a higher AM and PM peak compared to what was originally anticipated in the original 2018 study. It is our understanding, however, that the warrants for the traffic signal at the Nelson Road and Frontage Road intersection have already been met with prior development within the subdivision and this signal is currently in the process of being installed. 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: URSUS_MAJ File Enter Exit Total Enter Exit Total Enter Exit Total Lot 2A 80 153 153 306 37 9 46 9 33 42 Traffic Generation Summary (Based on Proposed Building Compared to Underlying TIS Rates) Property Units Average Weekday Trips Average Weekday, AM Peak Average Weekday, PM Peak Enter Exit Total Enter Exit Total Enter Exit Total Lot 2A 80 144 144 288 44 15 59 23 35 58 Trip Gen 12th Edition (Based on Proposed Building) Property Units Average Weekday Trips Average Weekday, AM Peak Average Weekday, PM Peak General Light Industrial (110) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday, AM Peak Hour of Generator Setting/Location:General Urban/Suburban Number of Studies:27 Avg. 1000 Sq. Ft. GFA:21 Directional Distribution:75% entering, 25% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 0.74 0.09 - 11.40 1.04 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average Rate Fitted Curve Equation: Not Given R²= **** Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 50 100 150 2000 10 20 30 40 50 60 80 59 4/22/26, 8:31 AM itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=TAGEN&x=80&edition=806&locationCode=General Urba… https://itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=TAGEN&x=80&edition=806&locationCode=General Urban/Suburban…1/1 General Light Industrial (110) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday, PM Peak Hour of Generator Setting/Location:General Urban/Suburban Number of Studies:27 Avg. 1000 Sq. Ft. GFA:21 Directional Distribution:40% entering, 60% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 0.72 0.09 - 8.77 0.78 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average RateFitted Curve Fitted Curve Equation: T = 0.29(X) + 8.73 R²= 0.59 Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 50 100 150 2000 10 20 30 40 50 60 80 58 32 4/22/26, 8:30 AM itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=TPGEN&x=80&edition=806&locationCode=General Urba… https://itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=TPGEN&x=80&edition=806&locationCode=General Urban/Suburban…1/1 General Light Industrial (110) Vehicle Trip Ends vs:1000 Sq. Ft. GFA On a:Weekday Setting/Location:General Urban/Suburban Number of Studies:27 Avg. 1000 Sq. Ft. GFA:21 Directional Distribution:50% entering, 50% exiting Vehicle Trip Generation per 1000 Sq. Ft. GFA Average Rate Range of Rates Standard Deviation 3.60 0.34 - 43.86 4.67 Data Plot and Equation T = Trip EndsX = 1000 Sq. Ft. GFA Study Site Average Rate Fitted Curve Equation: Not Given R²= **** Trip Gen Manual,12th Edition Institute of Transportation Engineers 0 50 100 150 2000 100 200 300 80 288 4/22/26, 8:32 AM itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=AWDVTE&x=80&edition=806&locationCode=General Urb… https://itetripgen.org/query/PrintGraph2?code=110&ivlabel=QFQAF&timeperiod=AWDVTE&x=80&edition=806&locationCode=General Urban/Suburba…1/1