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HomeMy WebLinkAbout008.01 Appendix C - Supplimental TIS Information 130 South Howie Street Helena, Montana 59601 406-459-1443 November 14, 2022 Simon Lindley City of Bozeman Transportation & Engineering Division 121 N Rouse Avenue Bozeman, MT 59715 RE: West Park Neighborhood TIS Review Comment Response This letter provides additional information relating to the traffic analysis for the West Park Neighborhood. It addresses review comments provided by Simon Lindley as part of the project review process on September 21, 2022. This narrative specifically address comments #3 and #140, related to the 15-year traffic volume projection for the intersection of Laurel Parkway and Durston Road and the 15-year traffic volume projection for the intersection of Laurel Parkway and West Babcock Street. The analysis proposes a path to move forward with the project while addressing the future needs of these intersections. The City of Bozeman has requested additional 15-year traffic volume projection information for the West Park Neighborhood development along Laurel Parkway. In order to evaluate the 15-year traffic volume projections for this area, ATS reviewed the 2040 traffic volumes from the Bozeman Transportation Master Plan. The 2017 Bozeman Transportation Master Plan projects traffic conditions on roadways throughout Bozeman through 2040 and takes into account anticipated land development projects which are expected to occur in this area of Bozeman over the next 20 years. However, the impacts from the improvements to the road network in this area over the next 15 years are difficult to quantify. The Bozeman Transportation Master Plan predicts that Cottonwood Road will be extended north to Baxter Lane and that Oak Street will be extended to Love Lane by 2040. However, the Master Plan does not include any analysis of the extension of Laurel Parkway to the south from Durston Road. The current road network changes under construction and planned changes will significantly impact how drivers travel though this area of Bozeman. Therefore, developing accurate 15-year traffic volume projections for Bozeman is extremely difficult. The 2017 Transportation plan did a good job of projecting traffic volumes into the future but did not precisely model the planned roadway improvements that are likely to occur west of Laurel Parkway over the next 10-20 years. In order to evaluate the 15-year traffic volume projections for this area in the original 2018 traffic analysis, ATS reviewed the 2040 traffic volumes from the Bozeman Transportation Master Plan and scaled the anticipated traffic volume growth to likely 2035 conditions using an overall traffic volume growth rate of 160%. This growth factor was applied on top of the projected traffic volumes calculated for the West Park Neighborhood. The results of this analysis suggest that the intersection of Durston Road with Laurel Parkway will operate at LOS F by 2035 with the current four-way STOP control configuration and may require the installation of a traffic signal or roundabout to improve operations. The unbuilt portions of the Norton East Ranch project will account for 15% of the traffic at this intersection by 2040. The Bozeman Transportation plan predicted that the intersection of Durston Road and Laurel Parkway would function at LOS B in 2040 and presumed that the intersection would be 2 signalized by that time. Based on the current traffic projections, the need to improve this intersection would occur with or without any additional development at the Norton East Ranch. While The Bozeman Transportation Master Plan provides some guidance on the likely growth trends in this area over the next 20 years, there are good reasons to question some of the findings and recommendations of the 2017 plan. While the plan does predict a 60% increase in traffic volumes along Durston Road over the next 15 years, this growth rate has not been confirmed by any current traffic growth trends for Durston Road. ATS collected all available historic traffic data for Durston Road from the MDT traffic database. This information is shown in the following table. The table indicates that despite the extremely high levels of growth in the western portions of Bozeman in the past ten years, the actual traffic volume growth rates observed along Durston Road by field collected data, do not confirm large increases in overall traffic volumes. An average of the traffic volumes along Durston Road over the last six years (the only data available for some segments) shows that traffic volumes on Durston Road have decreased over the time period. Only the traffic data for the section between Cottonwood Road and Flanders Mill has shown a traffic volume increase in the past ten years. Traffic volumes on this segment increased steadily through 2017 but have leveled off and decreased over the last three years as more road segments in this area have been developed. The overall traffic volume increase for this segment of Durston Road averaged less than 1% over the past ten years. While a low traffic volume growth rate along Durston Road seems improbable based on the high traffic volume growth rates within the Bozeman area, it should be noted that traffic volumes along East Main Street in Bozeman have remained relatively consistent for the past 40 years despite the population of the Bozeman area tripling during the time period. Historic Average Daily Traffic Data Durston Road 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 East of Love Lane #16-3A-030* - - - - 3,346 3,289 4,031 2,416 2,450 3,609 West of Flanders Mill # 16-3A-046 6,390 7,790 7,490 7,690 8,847 8,776 9,055 9,109 8,471 5,577 West of Hunters Way #16-3A-031* - - - - 8,778 8,629 9,655 9,713 7,534 8,137 *Data only available for 2016 to 2021. Based on the original 2018 traffic analysis performed for Norton Phase 5, the intersection of Durston Road and Laurel Parkway will function at LOS B as a four-way STOP through buildout of Phases 5 of the Norton Ranch. The more recent traffic data analysis performed for the intersection of Durston Road and Laurel Parkway for the West Park development in May of 2022, indicated that that the intersection would function at LOS C through the buildout of all phases of Norton Ranch Phase 5 and the four planned phases of the West Park development under the existing four-way STOP control configuration. Based on the known traffic volume growth rates for Durston Road, which currently are near zero based on observed historic data, 3 the intersection of Durston Road and Laurel Parkway will easily function at LOS C through the year 2035 with no additional traffic control improvements. A projection of the phasing for the project is provided on the attached West Park Phasing Concept. It needs to be emphasized that this projection is conceptual at best and dependent on market conditions moving forward. Planning is currently underway for Phase 1 only. There are currently no plans to move forward with the remaining Phases in the next two years. The first two phases of West Park will develop 102 units on the property in Phase 1 and up to 150 units in Phase 2 which will collectively add 1,197 new vehicle trips to the road network, approximately 35% of which will go north on Laurel Parkway creating a 5% percent traffic volume increase at the Durston Road/Laurel Parkway intersection. This traffic volume increase can easily be accommodated by existing road and intersection traffic controls. The developers acknowledge that improvements to the Durston Road and Laurel Parkway intersection may likely become necessary in the future, but the currently observed traffic volume growth rates for Durston Road do not remotely match the traffic forecasts from the 2017 Bozeman Transportation Master Plan. Based on the most current information available for the existing traffic volume growth in this area, traffic control improvements to the Durston Road/Laurel Parkway intersection are not currently necessary, are not necessary with the Norton development projects, and may not be necessary within the next 15 years. The developers are willing to consider improvements to Durston Road and Laurel Parkway to help future-proof the intersection for the continued growth of the western portion of Bozeman on a time schedule that is reasonable for the buildout of this area. Based on the above the following guide to move forward is proposed: 2023/2024 Move forward with the design and construction of Phase 1 2024 Design and Entitlement of Phase 2 2025 Construction of Phase 2 2025 Design and Entitlement of Phase 3 Update the Traffic Study to re-evaluate the Durston Road/Laurel Parkway Intersection. Based on need applicant will contribute up to $250,000 towards upgrades to the intersection. This offer is based on the improvement remaining on the Capital Improvements Plan for the fiscal year 2026. 2026 Construction of Phase 3 2026 Construction of Durston Rd/Laurel Parkway Intersection by City of Bozeman 2027 Design and Entitlement of Phase 4 2028 Construction of Phase 4 The order of phase development may be adjusted as the project matures. Moving forward, the need for improvements will be based on the unit counts proposed of the West Park Phasing Concept. The City of Bozeman also requested an analysis of the 15-year impacts of this project at the intersection of Babcock Street and Laurel Parkway. Currently, the intersection of Babcock Street and Laurel Parkway has thru- and left-turn lanes on all approaches. The intersection 4 does not currently connect to the north to Durston Road, but this connection is planned for completion as part of the Norton Ranch Phase 5. Much of the traffic from Norton Ranch Phase 5 will use the Babcock Street/Laurel Parkway Intersection. Less traffic from the West Park Neighborhood will be directed through this intersection due to the fact that the West Park Neighborhood is centered further east of Laurel Parkway and will typically use Pond Lily Drive to connect with Babcock Street. The total projected traffic from the overall Norton Ranch developments will reach 5,000 VPD and approximately half of this traffic may flow through the intersection of Babcock Street and Laurel Parkway. ATS performed a LOS analysis for this intersection with the projected traffic from the Norton Ranch projects using the available data for this intersection. Based on the current and immediately anticipated traffic volumes for this area, the intersection of Babcock Street and Laurel Parkway will function at LOS B as a typical two-way STOP controlled intersection with all of the presently planned projects in this area (see attached LOS worksheets). The intersection will function at LOS C or better with more than twice the currently projected traffic volumes at the intersection. Based on the available data and the current traffic projections, no traffic control modifications are needed at the intersection of Babcock Street and Laurel Parkway to meet the current or future traffic needs. Both Laurel Parkway and West Babcock Street are designated collector routes, and as such are not intended to carry high traffic volumes in the future. The 2017 Bozeman Transportation Master Plan does not provide any long-range future traffic volume projections for this section of Laurel Parkway. Based on the known traffic volume increases over the past ten years along Durston Road, it is likely that the traffic volume increases at the Laurel Parkway and West Babcock Street intersection will be dominated by the Norton projects with little to no additional background traffic growth over the next 15 years. Based on this information, the intersection of Laurel Parkway and West Babcock Street will function at LOS C or better through the year 2037. If you have any additional questions, please feel free to contact me at 406-459-1443. Bob Abelin, P.E. PTOE Abelin Traffic Services, Inc. HH HH HHHH HH HH 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S FM FM FM FM FM FM FM FM FM FM FM FM FMFMFM8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S 8S8S8S15SD15SD15SD15SD15SD15SD15SD15SD 15SD 15SD15SD15SD15SD15SD15SD15SD 15SD 15SD15SD12SD 15SD15SD15SD15SD8W 8W 8W 8W 8W 8W 8W 8W 8W 8W 8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8W8WDYHDYH 8W 8W8WDYH DYHDYH8W 8W 8W 8W 8W 8W 8W 8W 8W 8W 8W 8W 8W8S8S8S8S8S8S8S8S8S8S8S8S8S8S8S8S8S8S8S8SWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW S S S S S S S S S S S S S S S SD SD SD SD SD SD SD S S S S S S S S S S S S S S S SD SD SD SD SD SD SD SD SD SD SDS D S DD S D12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W12W8W8W8W8W 8W 8W 8S BP BP BPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBPBP 30SD30SD30SD30SD30SD 30SD15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S15S S S S S S S 15SD8W 30.00' WIDE PEDESTRIAN & STORM SEWER EASEMENT SEE DETAIL #3 SHEET 5 4795 4795479 0 4785 4785 4800 47 9 5 4795 4790479047 9 0 47954790BPBPBPBPBPNGNGNGBP XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXX OOOOOOOOOOOOOOOOOONGNG DYH DYHDYH S DS S G S S S S S S S WVWV WV WV WV WVWV WV WV WV T WV WV PT P T WV WV WV 16012974775.35 TOP-NUT WV 16012984775.39 TOP-NUT WV MW MW RIM 1 MW MW RIM 7 MW MW RIM 5 MW MW RIM 6 MW MW RIM 2 MW MW RIM 3 MW MW RIM 4 S201854780.033MHS-TEMPS WVWVSS WV DYHWV WV WV DYH WV WV WV 1601235 4781.196 WV WV WV WV WVWVDYHWV WV WV WV DYH WV WV WV WV WV BLOCK 1 LOT 2 5.24 acs. 228268 sq.ft. BLOCK 1 LOT 1 4.33 acs. 188509 sq.ft. BLOCK 2 LOT 1 6.93 acs. 302002 sq.ft. BLOCK 2 OPEN SPACE 1 3.98 acs. 173294 sq.ft. BLOCK 3 LOT 1 4.66 acs. 202931 sq.ft. BLOCK 3 CITY PARK 1 8.50 acs. 370171 sq.ft. BLOCK 4 CITY PARK 1 2.74 acs. 119234 sq.ft.N0°28'39"W53.70'N89°31'19"E 322.16'L3S88°48'52"W 192.99'L2S88°43'40"W 262.45'L4C6N2°11'57"E254.12'S87°48'03"E 120.00'L1S1°20'38"E502.50'S89°04'28"W 249.23'N0°55'32"W67.94'N26°16 '43 "W308.24 ' S58° 2 7' 5 1" W 94.31'N26°03 '24 "W85.32 'N12°31'56"W69.91'N6°14'03"E78.58'N31 °5 7 '5 0 "W160 .97 'N18°00'44"E147.56'S89°04'28"W 455.41'N0°36'20"W277.38'C5N18°00'44"E318.61'S0°54'46"E663.13'S89°04'28"W 312.94'S1°13'49"W1001.95'S89°04'28"W 385.91' N89°31'18"E 665.53'S1°13'49"W233.79'S72°0 5 ' 4 4 " E 434.4 2 ' C4 N88°38'24"E 357.61'C3N22°48'10"W251.56 ' C 2 N69° 4 9 ' 3 0 " W 192.7 4 ' N67°11' 5 0 " E 198.14' C1 S89°05'55"E 135.23'N0°46'46"W677.74'PUBLIC R-O-W 3.82 acs. 166342 sq.ft. 30.00' WIDE STORM DRAIN EASEMENT SEE DETAIL #1 SHEET 5 30.00 SANITARY SEWER EASEMENT SEE DETAIL #2 SHEET 5 30.00 SANITARY SEWER EASEMENT SEE DETAIL #2 SHEET 5 ©COPYRIGHT MORRISON-MAIERLE, INC.,2022 PLOTTED DATE: Oct/28/2022 PLOTTED BY: rosie nickelson DRAWING NAME: N:\10130\001.01 PrePlat\ACAD\Survey\PRELIM\Prelim-Plat.dwg 1/4 SEC.SECTION TOWNSHIP RANGE PROJ. #:SHEET OF PRINCIPAL MERIDIAN, MONTANA COUNTY, MONTANADATE: SCALE: CLIENT: FIELD WORK: DRAWN BY: CHECKED BY: engineers surveyors planners scientists MorrisonMaierle 2880 Technology Blvd West Bozeman, MT 59718 Phone: 406.587.0721 Fax: 406.922.6702 528FC,L.L.C. GALLATIN 10130.001 1" = 100' 4/2022 KIT KIT MMI 5E 5E 2S 2S 9 9 NWSE NESW LOCATED IN THE NORTHWEST ONE QUARTER OF THE SOUTHEAST ONE QUARTER AND NORTHEAST ONE QUARTER OF THE SOUTHWEST ONE QUARTER OF SECTION 9, TOWNSHIP 2 SOUTH, RANGE 5 EAST, PRINCIPAL MERIDIAN, CITY OF BOZEMAN, GALLATIN COUNTY, MONTANA. AMENDED PLAT OF LOTS R1A, R1B, R1C, AND R1D OF NORTON EAST RANCH SUBDIVISION PHASE 6 PLAT J-694 WEST QUARTER CORNER SECTION 9 FOUND 2" AC MARKED MDOT. MEASURED BEARING AND DISTANCE TO CALCULATED CENTER QUARTER. 100 200501000 SCALE IN FEET BASIS OF BEARING BOBCAT COORDINATE SYSTEM, NAD83(2011) PER THE "ROCKY MOUNTAIN TRIBAL COORDINATE REFERENCE SYSTEM" Handbook and User Guide, Published September 30th, 2014 and subsequent revisions, established by observations with survey grade receivers. Standard Parallel & Grid Origin: 46°15'00"N Central Meridian: 111°15'00"W False Northing : 100,000.000 Meters False Easting : 100,000.000 Meters Standard Parallel Scale : 1.000185 (exact) AREA SUMMARY- TABLE LOT AREA: PUBLIC R-O-W AREA: OPEN SPACE (PUBLIC): PARK: TOTAL AREA: LEGEND FOUND REBAR WITH PLASTIC CAP FOUND REBAR, 5/8 IN. DIAM. WITH AN ALUMINUM CAP, 1 1/2 IN. DIAM. SET REBAR, 5/8 IN. DIAM. WITH 2" ALUMINUM CAP MARKED 13108LS". FOUND SECTION CORNER AS NOTED FOUND ONE-QUARTER CORNER NOTHING FOUND OR SET RECORD S88°51'56" W 2671.77' MEASURED S89°03'52" W 2674.22'EAST QUARTER CORNER SECTION 9 FOUND 2" BRASS CAP IN MONUMENT BOX. MEASURED BEARING AND DISTANCE TO CALCULATED CENTER QUARTER. RECORD S88°51'56" W 2638.90' MEASURED S89°03'52" W 2638.82'RECORD S0°58'02" W 2702.70'MEASURED S1°09'52" W 2702.33'RECORD N0°58'02" E 2661.05'MEASURED N1°09'52" E 2660.63'POINT OF BEGINNING CALCULATED CENTER ONE QUARTER CORNER SOUTH QUARTER CORNER SECTION 9 FOUND 2" AC MARKED NON-LEGIBLE. MEASURED BEARING AND DISTANCE TO CALCULATED CENTER QUARTER. NORTH QUARTER CORNER SECTION 9 FOUND 2" AC MARKED MORRISON AND MAIERLE MEASURED BEARING AND DISTANCE TO CALCULATED CENTER QUARTER. 21.16 acres 3.32 acres 4.60 acres 11.74 acres 40.82 acres THE LAKES AT VALLEY WEST PHASE 6 THE LAKES AT VALLEY WEST PHASE 5 NOTE: STREETS ARE 35 FOOT WIDE IN 60 FOOT RIGHT-OF-WAY. ORIGINA L LOT R1C 467,265 S F EXISTING BOUNDARY NORTON EAST RANCH PHASE 6, LOTS R1A AND R1C. EXISTING BOUNDARY NORTON EAST RANCH PHASE 6, LOTS R1B AND R1D. ORIGINA L LOT R1D 516,039 S F POND EXISTING BOUNDARY NORTON EAST RANCH PHASE 6, LOTS R1C AND R1D ORIGINA L LOT R1A 467,265 S F ORIGINA L LOT R1B 516,039 S F NORTON EAST RANCH SUB PHASE 2A NORTON EAST RANCH SUB PHASE 1 NORTON EAST RANCH SUB PHASE 1 VALLEY WEST SUBDIVISION VALLEY WEST SUBDIVISION POND LILY DRIVE (60' R/W)VAU G H N D R I V E ( 6 0 ' R / W ) EXISTING PUE TO BE ABANDONED EXISTING PUE TO BE ABANDONED VALLEY WEST SUBDIVISION NORTON EAST RANCH SUB PHASE 5 POND LILY DRIVE(60' R/W)WETLAND CONSERVATION EASEMENT DOC. No.2299907 WATER LILY DRIVE(60' R/W)VAUGHN DRIVE (60')LAUREL PARKWAY (90' R/W)WEST BABCOK (90' R/W) ZONE 2 WATER COURSE SETBACK ZONE 1 WATERCOURSE SETBACK BAXTER CREEK PROPOSED WETLANDS 2.60 ACS. WETLAND CONSERVATION EASEMENT DOC. No.2299907 SEE SHEET 3 FOR PARCEL BEARING / DISTANCE INFORMATION SEE SHEET 4 FOR PARCEL BEARING / DISTANCE INFORMATION NORTON EAST RANCH SUB PHASE 5 LEGEND 15SD 15SD 15SD 15SD 8W 8W 8W 8W 8W 8S 8S 8S 8S 8S DYHWV S MW 15SD 15SD 15SD 15SD 8W 8W 8W 8W 8W 8S 8S 8S 8S 8S E P T BP BP BP BP FM FM FM SIDEWALK WALKING TRAIL ℄ DEDICATED WETLAND EASEMENT NO 2299907 EXISTING WETLANDS WETLANDS TO BE MITIGATED PROPOSED WETLANDS EXISTING UTILITY EASEMENT LINE PROPOSED UTILITY EASEMENT LINE EXISTING PROPERTY BOUNDARY PROPOSED PROPERTY BOUNDARY EXISTING BURIED POWER EXISTING SEWER MAIN W/ SIZE EXISTING WATER MAIN W/ SIZE EXISTING STORM DRAIN W/ SIZE PROPOSED BURIED POWER PROPOSED FORCE MAIN PROPOSED SEWER MAIN W/ SIZE PROPOSED WATER MAIN W/ SIZE PROPOSED STORM DRAIN W/ SIZE PUBLIC STORM WATER POND TELEPHONE PEDESTAL/ BOX ELECTICAL BOX POWER POLE ELECTRICAL TRANSFORMER BOX PROPOSED STREET LIGHTS STORM DRAIN INLET STORM DRAIN MH SANITARY SEWER MH WATER CURB STOP WATER VALVE FIRE HYDRANT SIGN MONITORING WELL EXISTING CONTOUR (MAJOR) EXISTING CONTOUR (MINOR) PROPOSED CONTOUR (MAJOR) PROPOSED CONTOUR (MINOR) ABANDONED NO NAME DITCH CASCADE STREET (60' R/W) BLOCK 1 OPEN SPACE 1 0.63 acs. 27262 sq.ft.