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Home My WebLink About015 Trip Comparison Letter July 13, 2023 Reference: Canyon Gate Traffic Analysis Project No. 21322 Mr. Gault: The purpose of this letter is to provide a comparison of projected trip generation for the proposed Canyon Gate Development in Bozeman, Montana. The site was originally evaluated in the Canyon Gate Traffic Impact Study completed by Sanderson Stewart in April 2023. The gross trip generation (prior to internal capture and pass-by) projections presented in the previous study totaled 4,606 average weekday trips, with 264 trips during the AM peak hour and 430 trips during the PM peak hour for the full development. These projections assumed the following land uses: 94 single family attached units, 196 multifamily units, 180 low rise residential with ground floor commercial units, 13,300 square-feet of office space, 13,400 SF of retail uses, and 13,300 SF of restaurant space. The new land use densities for the Canyon Gate Development are listed as follows: 102 single family attached units, 208 multifamily units, 180 low rise residential with ground floor commercial units, 13,300 square-feet of office space, 13,400 SF of retail uses, and 13,300 SF of restaurant space. This is an increase of 20 residential units which will add an additional 138 total external weekday trips, with 9 additional trips in the AM and PM peak hours. At the most, this is anticipated to add a total of 3 trips to the Northview/Bridger Dr intersection, 1 trip at Boylan/Story Mill, and 5 trips at Bridger Dr/Story Mill during each peak hour. At the site access intersections, the trips would be distributed with 3 at Maiden Spirit/Northview, 1 at Boylan/Spirit Crossing, and 5 at the Main Access on Story Mill. These small changes in site density will not generate enough additional total trips across the development to be concerned about operations at any internal intersections or even see a change in delay or queuing from the original TIS. If you have any questions or concerns, please feel free to contact me at 406-922-4306 or jstaszcuk@sandersonstewart.com. Sincerely, Joey Staszcuk, PE, PTOE, RSP1 Senior Engineer | Community Transportation Studio Manager ARS/jhs Enc: Andrew Gault July 13, 2023 Page 2 Intensity Units total enter exit total enter exit total enter exit Single-Family Attached Housing¹ 102 Dwelling Units 734 367 367 49 15 34 58 33 25 102 46 56 1 0 1 12 6 6 Multifamily Housing (Low-Rise)² 208 Dwelling Units 1402 701 701 83 20 63 106 67 39 199 89 110 3 1 2 21 11 10 Low Rise Res. with Ground-Floor Comm3 180 Dwelling Units 619 310 309 79 18 61 65 46 19 General Office Building4 13.3 1000 SF GFA 144 72 72 20 18 2 19 3 16 93 51 42 4 2 2 7 3 4 Strip Retail Plaza5 13.4 1000 SF GFA 730 365 365 32 19 13 88 44 44 335 172 163 7 3 4 46 21 25 Fine Dining Restaurant 6 13.3 1000 SF GFA 1115 558 557 10 5 5 104 70 34 379 196 183 5 4 1 45 24 21 324 159 165 2 0 2 26 20 6 4744 2373 2371 273 95 178 440 263 177 1108 554 554 20 10 10 131 65 66 324 159 165 2 0 2 26 20 6 3312 1660 1652 251 85 166 283 178 105 (1) Single-Family Attached Housing - Land Use 215* Units = Dwelling Units Average Weekday: Average Rate = 7.20 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 0.48 (31% entering/69% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 0.57 (57% entering/43% exiting) (2) Multifamily Housing (Low-Rise) - Land Use 220* Units = Dwelling Units Average Weekday: Average Rate = 6.74 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 0.40 (24% entering/76% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 0.51 (63% entering/37% exiting) (3) Low-Rise Residential w/ Ground-Floor Commercial - Land Use 230* Units = Dwelling Units Average Weekday: Average Rate = 3.44 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 0.44 (23% entering/77% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 0.36 (71% entering/29% exiting) (4) General Office - Land Use 710* Units = 1000 SF GFA Average Weekday: Average Rate = 10.84 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 1.52 (88% entering/12% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 1.44 (17% entering/83% exiting) (5) Strip Retail Plaza - Land Use 822* Units = 1000 SF GFA Average Weekday: Average Rate = 54.45 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 2.36 (60% entering/40% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 6.59 (50% entering/50% exiting) (6) Fine Dining Restaurant - Land Use 931* Units = 1000 SF GFA Average Weekday: Average Rate = 83.84 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 7 and 9 AM: Average Rate = 0.73 (50% entering/50% exiting) Peak Hour of the Adjacent Street, One Hour between 4 and 6 PM: Average Rate = 7.80 (67% entering/33% exiting) *Trip Generation, 11th Edition, Institute of Transportation Engineers, 2021 **Trip Generation Handbook, 3rd Edition, Institute of Transportation Engineers, 2017 Independent Variable PM Peak Hour Internal Capture Trips** Internal Capture Trips** AM Peak Hour Total Buildout New External Trips Total Buildout Gross Trips Total Buildout Internal Capture Trips Total Buildout Pass-By Trips Land Use Average Weekday Pass-By Trips** (Avg. Rate = 44%) Internal Capture Trips** Internal Capture Trips** Internal Capture Trips**