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Home My WebLink About015 Trip Generation Memo To: City of Bozeman, Engineering Department Attn: Candace Mastel, Transportation Demand Management Coordinator From: SET Engineering Re: Sundance Springs Preliminary Trip Generation Analysis Memorandum April 17, 2025 This memo is being provided to provide the City of Bozeman Engineering Staff with preliminary trip generation values for the subject project based upon the Landscape Plan, Area Plans – West Bldg, and Area Plans – East Bldg dated January 8th, 2025, provided by Miller Design/Build and included as Attachment A. As part of City’s site plan approval process, SET Engineering is providing trip generation information in lieu of a formal traffic impact analysis per engineering staff’s request. The conclusions outlined herein inform the need for further traffic impact analysis. Time Periods and Trip Generation The following trip generations values are determined for the purpose of this memo and are outlined in Attachment B. Calculations are performed with the ITE TripGen Web-Based App, which utilizes trip generation rates derived from the Institute of Transportation Engineers Trips Generation Manual, 11th Ed. (ITE, 11th Ed.). These values, as well as entering and exiting values are shown in detail in Attachment C. • Weekday Average Daily Trips are determined to be 331 Average Daily Trips (ADT).* • Weekday AM Peak Hour of Adjacent Street Traffic is determined to be 26 trips. • Weekday PM Peak Hour of Adjacent Street Traffic is determined to be 35 trips. • Weekday AM Peak Hour of Generator is determined to be 40 trips. • Weekday PM Peak Hour of Generator is determined to be 51 trips. * ITE Trip Generation does not have data regarding Weekday Average Daily Trips for Health/Fitness Clubs. Therefore, an expansion factor of 7.3 was applied to PM Peak Hour traffic data. Internal Capture Rate In mixed-use developments, traffic engineers need to assess the trips that originate and terminate internally by other uses on the site. These trips reduce the overall trip generation produced and are termed internal capture rates (ICR). National Cooperative Highway Research Program (NCHRP) publication 684 defines ICRs for AM Peak and PM Peak periods, which are used for analysis of the subject project and highlighted in Attachment D. Please contact SET Engineering directly with any questions regarding traffic analyses for the subject project. Sincerely, Jeff Pillus, P.E. jeffp@setengineering.com (970) 403-5088 ext. 700 Riley Shea rileys@setengineering.com (970) 403-5088 ext. 707 Attachment A: Landscape Plan and Building Plans Attachment B: Generation Rates by Land Use Attachment C: Trip Generation Summary Attachment D: NCHRP 684 Internal Capture Rate PACIFIC WILLOW BUSH RUSSIAN SAGE BUSH JAPANESE LILAC TREE TATARIAN MAPLE QUAKING ASPEN LILAC - SCREENING SM WESTRETENTIONPOND EAST RETENTIONPOND SM OPEN SPACE - LAWN(1,439 SF) WEST B U I L D I I N G ELEV: 5 0 3 8 ' ENTRAN C E EAST BUILDIINGELEV: 5036' 279.48' 233.92' LITTLE H O R S E R O A DS. 3RD AVENUEEXISTING OPEN MEADOW EXISTINGWALKING &BIKE PATH PROPOSED WALKING &BIKE PATH CONNECTOR STREET VISION TRIANGLEDESIGNED ACCORDING TO38.400.100 BMC EXISTINGFIRE HYDRANT POWERTRANSFORMER POWER METER &SPRINKLER CONTROLS PROPOSED WALKING &BIKE PATH CONNECTOR SETBACK 10' - 0"SETBACK10' - 0"(E) DITCH EXISTINGWALKING &BIKE PATH SETBACK10' - 0"(E) WELL IRRIGATIONMETER, STUB, AND BACKFLOWPREVENTER ENCLOSED DUMPSTER AREA - SCREENED ENTRANCE S E T B A C K 5' - 0 " SETBAC K 10' - 0" 50' WATER SETBACK 30' WATER SETBACK DELINEATED WETLAND MIDDLE CREEK DITCH OUTDOOR PATIO SNOW STORAGEU.G. WATER LINE U.G. WATER LINE - SEE CIVIL PLAN (E) TREE (E) TREE (E) TREE (E) TREE PROPOSED PARKING LOT ACESS BERTHSIDEWALKSIDEWALK SIDEWALK FIRE APPARATUS TURN IN SNOW STORAGEEXISTING OPEN MEADOWEXISTING OPEN MEADOWRIP-RAP BOULDER PERIMETER, TYP. RIP-RAP BOULDER / FOLIAGE PERIMETER, TYP. PROPERTY BOUNDARY PROPERTY BOUNDARY SIDEW A L K PLANTING AREAS= MIX OF NATIIVE GRASSES, LOW HEIGHT SHRUBS / FLOWERS,TYPICAL PLANTING AREAS= MIX OF NATIIVE GRASSES, LOW HEIGHT SHRUBS / FLOWERS,TYPICAL PLANTING AREAS= MIX OF NATIIVE GRASSES, LOW HEIGHT SHRUBS / FLOWERS,TYPICAL PLANTING AREAS= MIX OF NATIIVE GRASSES, LOW HEIGHT SHRUBS / FLOWERS,TYPICAL PLANTING AREAS= MIX OF NATIIVE GRASSES, LOW HEIGHT SHRUBS / FLOWERS,TYPICAL LILAC - SCREENING, TYP. @ PARKING LOT PERIMITER LILAC - SCREENING, TYP. @ PARKING LOT PERIMITER 6ft Wood Bench, typ. PROPOSED WALKING &BIKE PATH CONNECTOR 6ft Wood Bench, typ. DRAWN BY: SCALE: PROJECT: pobox 2016 Bozeman, MT 59771(406)531.9671 millerdesignbuild@gmail.com DATE:PROJECT NO REVISION DATE As indicated l1.0 SM Landscape Plan - Schematic Site OverallPhase 1 B - Lot2 Little Horse DriveBozeman, MT 59715 01251-8-2025 Informal Site ReviewPLANTING LEGEND 11 3-12-253-12-25 1/16" = 1'-0"1 Landscape Plan _ Schematic PARKING LOT = 54 SPACES(1) TREE per (9) SPACES= (6) TREES REQUIRED= (13) TREES PROVIDED ADJACENT TO PARKING LOT ADJACENT SETBACK TREE REQUIREMENT(1) TREE PER 50 FT OF ADJACENT SETBACK=TOTAL SETBACK APPROX. 630 LINEAR FEET:630FT / 50 = (13) TREES REQUIRED ; (20) PROVIDED •••••••••• LANDSCAPE PLANTING / TURF NOTES-UTILIZE THE EXISTING LANDSCAPING WELL FOR IRRIGATION NEEDS. -ALL PLANTING AND TURF SHALL UTILIZE U.G. IRRIGATION -MAJORITY OF SITE INTENDS TO UTILIZE NATIVE, DROUGHT TOLERANT AND WATER SMART PLANTING SPECIES, MINIMIZING THE AMOUNT OF TURF WATERING REQUIREMENTS. Achillea x 'Moonshine' (Yarrow)Bouteloua gracilis (Blue Grama)Berberis thunbergii (Concorde Japanese Barberry)Echinacea pallida (Pale Purple Coneflower)Erigeron compositus (Cutleaf Daisy)Festuca glauca (Blue Fescue)Gaillardia aristata (Blanket Flower)Penstemon strictus (Rocky Mountain Penstemon)Schizachyrium scoparium (Little Bluestem)Symphyotrichum oblongifolium (Dream of Beauty) -APPROXIMATELY 1,440 SQFT OF TURF TO BE UTILIZED AS OPEN SPACE AS SEEN ON PLANS.-TURF SOD SHALL CONSIST OF KENTUCKY BLUEGRASS 1 1 2480 SF LEVEL 1 2480 SF LEVEL 2 OPEN TO BELOW 2088 SF Health Gym 898 SF Office 1 1052 SF Office 2 OPEN TO BELOW DRAWN BY: SCALE: PROJECT: pobox 2016 Bozeman, MT 59771(406)531.9671 millerdesignbuild@gmail.com DATE:PROJECT NO REVISION DATE 1/8" = 1'-0" a1.5 SM Area Plans - East Bldg. EAST BLDG.Phase 1 B - Lot2 Little Horse DriveBozeman, MT 59715 01251-8-2025 Informal Site Plan Reivew0 2 10 18 1/8" = 1'-0"1 Level 1 - Building SQFT 021018 1/8" = 1'-0"2Level 2 - Building SQFT 0 2 10 18 1/8" = 1'-0"3 Level 1 - Parking Area Plan 021018 1/8" = 1'-0"4Level 2 - Parking Area Plan BUILDING AREA SQUARE FOOTAGE Level Area Level 1 2480 SF Level 2 2480 SF TOTAL BUILDING SQFT 4960 SF PARKING AREA CLASSIFICATION per BMC / PARKING LOAD SCHEDULE Level Name Area Parking LoadFactor Parking Load Level 1 Health Gym 2088 SF 200 SF 10.44 Level 1 2088 SF 10.44 Level 2 Office 1 898 SF 250 SF 3.59 Level 2 Office 2 1052 SF 250 SF 4.21 Level 2 1950 SF 7.80 Totals 4038 SF 18.24 815.5 SF RESTAURANT 1141.9SF RETAIL STORE 682.7 SF EXTERIOR SEATING Bar Service AreaWaiting AreaKitchen Area 670.1 SF OFFICE 1 529.5 SF OFFICE 1 OPEN ATRIUM TO BELOW Open Walkway Elevator Shaft 3300.0SF Level 1 EXTERIOR WALKWAY EXTERIOR PATIO EXTERIOR PAD / UTILITY SCREENING 1670.7SF Level 2 OPEN ATRIUM TO BELOW Open Walkway Elevator Shaft DRAWN BY: SCALE: PROJECT: pobox 2016 Bozeman, MT 59771(406)531.9671 millerdesignbuild@gmail.com DATE:PROJECT NO REVISION DATE 1/8" = 1'-0" a1.1 Author Area Plans - West Bldg. WEST BLDG.Phase 1 B - Lot2 Little Horse DriveBozeman, MT 59715 01251-8-2025 Informal Site Plan Reivew0 2 10 18 1/8" = 1'-0"2 LEVEL 1 - Parking Area Plan 021018 1/8" = 1'-0"4LEVEL 2 - Parking Area Plan 0 2 10 18 1/8" = 1'-0"1 Level 1 - Building SQFT 021018 1/8" = 1'-0"3Level 2 - Building SQFT PARKING AREA CLASSIFICATION per BMC / PARKING LOAD SCHEDULE Level Name Area Parking Load Factor Parking Load Level 1 EXTERIOR SEATING 682.7 SF 100 SF 6.83 Level 1 RESTAURANT 815.5 SF 50 SF 16.31 Level 1 RETAIL STORE 1141.9 SF 300 SF 3.81 Level 1 2640.1 SF 26.94 Level 2 OFFICE 1 670.1 SF 250 SF 2.68 Level 2 OFFICE 1 529.5 SF 250 SF 2.12 Level 2 1199.7 SF 4.80 Totals 3839.8 SF 31.74 BUILDING AREA SQUARE FOOTAGE Level Area Level 1 3300.0 SF Level 2 1670.7 SF TOTALBUILDINGSQFT 4970.7 SF Project:Sundance Springs Day/Period Total Trips Pass-By Trips Avg Rate Min Rate Max Rate Std Dev Avg Size % Enter % Exit Use Eq.Equation R2 Weekday Average Daily Trips 46 14.39 4.44 50.91 10.16 3 50 50 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour Generator 9 2.61 0.9 7.83 1.49 3 60 40 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour of Adjacent Street Traffic 6 1.67 0.76 4.12 0.88 3 82 18 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour Generator 10 3.15 0.56 9.14 2.29 3 42 58 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour of Adjacent Street Traffic 7 2.16 0.56 5.5 1.26 3 34 66 False Source:Trip Generation Manual 11th Edition 1 Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Detailed Land Use Data For 3.15 1000 Sq. Ft. GFA of Office Space (712) Small Office Building Analysis Date: 4/16/2025 Project:Sundance Springs Day/Period Total Trips Pass-By Trips Avg Rate Min Rate Max Rate Std Dev Avg Size % Enter % Exit Use Eq.Equation R2 Weekday Average Daily Trips 62 53.87 33.92 107.06 12.93 98 50 50 False Ln(T) = 0.77 Ln(X) + 5.05 0.83 Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour Generator 7 5.61 2.9 9.52 2.24 79 51 49 False Ln(T) = 0.74 Ln(X) + 2.82 0.78 Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour of Adjacent Street Traffic 2 1.18 0.51 2.64 0.69 70 70 30 False Ln(T) = 0.84 Ln(X) + 0.74 0.64 Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour Generator 7 5.42 3.17 12.14 1.59 98 50 50 False Ln(T) = 0.70 Ln(X) + 3.06 0.75 Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour of Adjacent Street Traffic 6 4.86 1.57 10.21 1.47 110 50 50 False Ln(T) = 0.84 Ln(X) + 2.30 0.59 Source:Trip Generation Manual 11th Edition 2 Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Detailed Land Use Data For 1.14 1000 Sq. Ft. GFA of Retail (815) Free-Standing Discount Store Analysis Date: 4/16/2025 Project:Sundance Springs Day/Period Total Trips Pass-By Trips Avg Rate Min Rate Max Rate Std Dev Avg Size % Enter % Exit Use Eq.Equation R2 Weekday Average Daily Trips 161 107.2 13.04 742.41 66.72 5 50 50 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour Generator 21 13.68 1.74 112.49 11.29 6 57 43 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour of Adjacent Street Traffic 15 9.57 0.76 102.39 11.61 5 55 45 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour Generator 25 16.35 3.04 89.99 10.84 4 51 49 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour of Adjacent Street Traffic 14 9.05 0.92 62.00 6.18 6 61 39 False Source:Trip Generation Manual 11th Edition 3 Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Detailed Land Use Data For 1.50 1000 Sq. Ft. GFA of Restaurant (932) High Turnover (Sit-Down) Restaurant Analysis Date: 4/16/2025 Project:Sundance Springs Day/Period Total Trips Pass-By Trips Avg Rate Min Rate Max Rate Std Dev Avg Size % Enter % Exit Use Eq.Equation R2 Weekday Average Daily Trips*62 29.47 50 50 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour Generator 3 1.4 0.3 2 0.78 42 46 54 False Source:Trip Generation Manual 11th Edition Weekday AM Peak Hour of Adjacent Street Traffic 3 1.31 0.3 2 0.64 44 51 49 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour Generator 9 3.92 3.08 4.3 0.59 40 52 48 False Source:Trip Generation Manual 11th Edition Weekday PM Peak Hour of Adjacent Street Traffic 8 3.45 1.48 8.37 1.57 37 57 43 False Source:Trip Generation Manual 11th Edition *ITE Trip Generation does not have data regarding Weekday Average Daily Trips for Health/Fitness Clubs. Therefore, an expansion factor of 7.3 was applied to PM Peak Hour traffic data. 4 Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Detailed Land Use Data For 2.09 1000 Sq. Ft. GFA Health Gym (492) Health/Fitness Club Analysis Date: 4/16/2025 Project:Sundance Springs ITE Land Use *Enter Exit Total *Enter Exit Total *Enter Exit Total 712 Office Space 23 23 46 5 1 6 2 5 7 3.15 1000 Sq. Ft. GFA 815 Free Standing Discount Store 31 31 62 1 1 2 3 3 6 1.14 1000 Sq. Ft. GFA 932 Restaurant 80.5 80.5 161 8 7 15 9 5 14 1.50 1000 Sq. Ft. GFA 492 Health Club 31 31 62 2 1 3 3 5 8 2.09 1000 Sq. Ft GFA Unadjusted Volume 166 166 331 17 9 26 17 18 35 Internal Capture Trips 1 1 2 3 3 6 Pass-By Trips Volume Added to Adjacent Streets 166 166 331 16 8 24 14 15 29 Total Weekday Average Daily Trips Internal Capture = 0 Percent Total Weekday AM Peak Hour of Adjacent Street Traffic Internal Capture = 8 Percent Total Weekday PM Peak Hour of Adjacent Street Traffic Internal Capture = 17 Percent * Custom rate used for selected time period Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Trip Generation Summary Weekday Average Daily Trips Weekday AM Peak Hour Adjacent Street Traffic Weekday PM Peak Hour Adjacent Street Traffic Analysis Date: 4/16/2025 Project:Sundance Springs ITE Land Use *Enter Exit Total *Enter Exit Total 712 Office Space 5 4 9 4 6 10 3.15 1000 Sq. Ft. GFA 815 Free Standing Discount Store 4 3 7 4 4 7 1.14 1000 Sq. Ft. GFA 932 Restaurant 12 9 21 13 12 25 1.50 1000 Sq. Ft. GFA 492 Health Club 1 2 3 5 4 9 2.09 1000 Sq. Ft GFA Unadjusted Volume 22 18 40 25 26 51 Internal Capture Trips Pass-By Trips Volume Added to Adjacent Streets 22 18 40 25 26 51 Total Weekday PM Peak Hour of Generator Internal Capture = 0 Percent Total Weekday AM Peak Hour of Generator Internal Capture = 0 Percent * Custom rate used for selected time period Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition Trip Generation Summary Analysis Date: 4/16/2025 Weekday AM Peak Hour of Generator Weekday PM Peak Hour of Generator Project:Sundance Springs Internal External Total Percent Internal External Total Percent Internal External Total Percent Internal External Total Percent 0 0 0 0%0 0 0 0%0 0 0 0%0 0 0 0% 0 0 0 0%0 0 0 0%0 0 0 0%0 0 0 0% 1 4 5 20%0 1 1 0%0 2 2 0%0 5 5 0% 0 0 0 0%0 0 0 0%0 0 0 0%0 0 0 0% 0 8 8 0%1 6 7 14%1 8 9 11%2 3 5 40% 0 1 1 0%0 1 1 0%2 1 3 67%1 2 3 33% All Other Land Uses 0 2 2 0%0 1 1 0%All Other Land Uses 0 3 3 0%0 5 5 0% 1 15 16 6%1 9 10 10%3 14 17 18%3 15 18 17% Internal Capture Report - Sundance Springs Site Plan AM & PM Peak Hour Analysis Date: 4/16/2025 Source: Institue of Transportation Engineergs, Trip Generation Manual 11th Edition AM Category Cinema Hotel Office Residential Restaurant Retail Entering Trips Exiting TripsExiting Trips PM Restaurant Retail Totals Totals Entering Trips Category Cinema Hotel Office Residential