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HomeMy WebLinkAboutTIS-Lot4UPDATE2013 Traffic Impact Study- UPDATE Spring Creek Village – Lot 4 Commercial Development Bozeman, Montana Prepared For: Delaney & Company 101 East Main Suite D Bozeman, MT 59715 June, 2013 130 South Howie Street Helena, Montana 59601 406-459-1443 LOT 4 Spring Creek Village Subdivision Bozeman, Montana i Table of Contents A. Executive Summary ......................................................................................1 B. Project Description ........................................................................................1 C. Existing Conditions ........................................................................................1 Adjacent Roadways ..............................................................................2 Traffic Counts ........................................................................................3 Additional Developments.......................................................................4 Level of Service .....................................................................................4 D. Proposed Development ..............................................................................5 E. Trip Generation and Assignment ................................................................7 F. Trip Distribution ..........................................................................................8 G. Traffic Impacts Outside of the Development ...............................................9 H. Impact Summary & Recommendations .................................................... 10 List of Figures Figure 1 – Proposed Development Site ...................................................................2 Figure 2 – Proposed Development ..........................................................................6 Figure 3 – Trip Distribution ......................................................................................9 List of Tables Table 1 – Historic Daily Traffic Data ........................................................................3 Table 2 – Existing Level of Service Summary .........................................................4 Table 3 – Trip Generation Rates .............................................................................7 Table 4 – Level of Service Summary With Development ........................................9 LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 1 June, 2013 Traffic Impact Study-Update LOT 4 Spring Creek Village Subdivision Bozeman, Montana A. EXECUTIVE SUMMARY As proposed, the development of LOT 4 of the Spring Creek Village Subdivision will have a minimal impact on the surrounding road system. Although the development may produce up to 6,000 new trips in this area, these vehicles will be distributed widely over the existing area road network and no intersections will see major additional traffic loads. The intersection of Fergusson Road and Babcock Street is nearing its functional capacity as a two-way STOP controlled intersection and may need to be modified to a four-way STOP to serve the additional traffic from the Spring Creek Village and the other developments currently underway in this area. Depending on the rate of development at the Spring Creek Village and the other developments in this area, this four-way STOP may be necessary before the intersection is measurably impacted by the Spring Creek Village project. The Spring Creek Village subdivision would benefit from a right-turn deceleration lane at Resort Drive or Park Avenue. It would be desirable to meet with MDT and the City of Bozeman to develop a plan for creating right-turn deceleration lanes in this area to meet the overall development goals of this area of Bozeman. B. PROJECT DESCRIPTION This document studies the possible effect on the surrounding road system from the development of L O T 4 , a proposed 20-acre commercial development along the western edge of Bozeman, Montana. The site is located just north of Huffine Lane (U.S. Hwy 191) between Cottonwood Road and Ferguson Avenue. The developers propose to develop the property into a commercial and retail center. This document is an update of the February 2012 Traffic Impact Study for this project prepared by ATS and includes an updated site plan and updated intersection turning movement count data. C. EXISTING CONDITIONS The proposed development property currently consists of a 20-acre parcel of undeveloped land located north of Huffine Lane between Cottonwood Road and Ferguson Road. Huffine Lane (US 191) dominates the transportation system surrounding this site, which is the primary connection between Bozeman and Four Corners. Other streets surrounding the proposed development are Ferguson Avenue, Cottonwood Road, Fallon Street, and Resort Drive. Most of these streets are included on the Bozeman “Major Street Network”. Huffine Lane and Cottonwood Road are LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 2 June, 2013 principal arterials, Ferguson Avenue is a designated collector route, and Fallon Street and Resort Drive are local streets. See Figure 1 for a location map of the proposed development. Adjacent Roadways Huffine Lane (SR 191) is a five-lane, two-way, east-west principal arterial and State highway. All cross streets or private driveways are signalized or Stop controlled between Four Corners and the City of Bozeman. The speed limit on Huffine Lane adjacent to the proposed development site is 55 mph. The SR 191 alignment swings northeast after intersecting College Street and becomes Main Street. Traffic data collected by MDT in 2010 indicates that the roadway carries an Average Daily Traffic (ADT) volume of 21,270 vehicles per day. Ferguson Avenue i s a t w o -lane, two-way collector that runs north from Huffine Lane. The road provides access to many of the newly constructed residential development in this section of Bozeman. The intersection of Ferguson Avenue and Huffine Lane is currently signalized. Figure 1- Proposed Development Site Proposed Spring Creek Lot 4 Development Site LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 3 June, 2013 Cottonwood Road i s a t w o -lane, north/south principal arterial street. North of Huffine Lane the road currently has a variety of new commercial businesses including the JC Billion car dealership. South of Huffine Lane, Cottonwood Road serves a variety of rural residential areas and farm and ranch lands. Fallon Street is a two-way, paved east/west local road that provides access to existing developments north of Huffine Lane. Fallon Street passes just to the north of the proposed development site and is currently constructed with designated bike lanes on each side of the roadway. Resort Drive is a newly constructed north/south route located between Cottonwood Road and Ferguson Avenue, which has designated bike lanes on each side. At the intersection with Huffine Lane the road is constructed with a channelized right-turn bay to restrict left-turn movements at the intersection. Resort Drive is a low-volume road which currently carries approximately 100 VPD. Traffic Counts In May 2013 Abelin Traffic Services collected new traffic data at five locations along Ferguson Avenue and Cottonwood Road to update the traffic study for this project. The 2013 traffic study locations along Ferguson Road included the intersections of Huffine Lane, and Babcock Street. Along Cottonwood Road ATS collected new traffic data at Huffine Lane, Fallon Street and Babcock Street. ATS also used data from a 2011 traffic count at the intersection of Ferguson Road and Fallon Street. Traffic volumes along Huffine Lane have been increasing over the past three years and are presently near the high levels seen in 2006. Traffic data form MDT shows how traffic volumes in this area have varied over the past eight years. This data is presented in Table 1. It is likely that the traffic volumes along Huffine Lane will continue to increase. However, the rate of traffic volume increase is difficult to evaluate at this time. Table 1 – Huffine Lane Historic Average Daily Traffic Data Location (Huffine Lane) 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 East of Cottonwood Road 18,130 19,885 19,195 22,515 22,515 22,580 19,835 19,675 18,900 21,270 LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 4 June, 2013 Additional Developments Several other developments are approved and under construction in this area. The Norton East Ranch Phase II Development is currently under construction west of the Cottonwood Road. This development will ultimately include 332 mixed residential units and produce over 2,300 vehicle trips per day. It is not currently known when this project will be fully developed. The Cottonwood Condominiums project in currently under construction north of Fallon Street with 80 residential units currently constructed and an additional 76 units planned over the next five to six years. Level of Service Using the data collected for this project, ATS conducted a Level of Service (LOS) analysis at the area intersections. This evaluation was conducted in accordance with the procedures outlined in the Transportation Research Board’s Highway Capacity Manual (HCM) - Special Report 209 and the Highway Capacity Software (HCS) version 6.1. Intersections are graded from A to F representing the average delay that a vehicle entering an intersection can expect. Typically, a LOS of C or better is considered acceptable for peak-hour conditions. T h e L O S calculations are included in Appendix C. Table 2 shows the existing LOS conditions in this area based on the current traffic data. The table indicates that all of the intersections in the study area are currently operation at acceptable levels of service with the existing lane configurations and traffic controls. The intersection of Ferguson Avenue and Babcock Street is operating at an acceptable level of service, but has little reserve capacity for additional growth in this area. TA B L E 2 – Existing 2013 Level of Service Summary INTERSECTION A M PM D E L A Y LOS D E L A Y LOS Ferguson Avenue & Huffine Lane 15.3 B 19.5 B Ferguson Avenue & Fallon Street* 21.5/15.5 C/C 19.0/11.5 C/B Ferguson Avenue & Babcock Street* 22.3/17.5 C/C 21.3/22.6 C/C Huffine Lane & Resort Drive 17.9 B 11.0 B Huffine Lane & Cottonwood Road 18.2 B 20.1 C Cottonwood Road and Fallon Street* 12.8/12.2 B/B 15.0/10.7 C/B Cottonwood Road and Babcock Street* 13.2/12.8 B/B 10.6/10.0 B/B *Westbound/Eastbound Delay and LOS. ATS also reviewed the right-turn lane warrants for the intersections along Huffine Lane based on the requirement from the MDT Road Design Manual. The intersection of Huffine Lane and Ferguson Road currently has a right-turn deceleration lane for westbound traffic. This analysis indicates that a right-turn deceleration lane is currently warranted for LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 5 June, 2013 westbound traffic at the intersection of Cottonwood Road. The turn-lane warrant information is shown in Appendix D. D. PROPOSED DEVELOPMENT The Spring Creek Village Subdivision would be developed into a mixed-use retail, recreational, lodging, and commercial center. The site will include banks, restaurant/bars, general retail spaces with second floor offices, a lodge with a spa and cabins, and a driving range/putting course. The development would have direct accesses onto, Resort Drive and Huffine Lane. The current site-plan for LOT 4 of the Spring Creek Village development is shown in Figure 2. Proposed Roadway Layout Most of the roadways surrounding the proposed development are already constructed. The developers propose to build the remaining roads within the proposed development to an urban standard with curb and gutter. Pedestrian and bicycle safety will be a focus for this project and many roadway improvements will be implemented with that goal in mind. All of the roads within the development would be privately owned and maintained. The main roads which will be affected by this project are Huffine Lane (principal arterial), Ferguson Road (collector), Cottonwood Road (collector), Fallon Street (local), and Resort Drive (local). The intersection of Resort Drive and Huffine Lane currently has a channelized right-turn lane to restrict vehicles to right-out only movements onto Huffine Lane. Right- and left-turning movements are currently allowed into Resort Drive. Huffine Lane also has a designated left -turn deceleration lane at this location. No changes are planned at this intersection from this development. The proposed development would include a new right-in/out only intersection with Huffine Lane located between Resort Drive and Cottonwood Road. This approach would serve as the primary access to the site from Huffine Lane for westbound traffic. Eastbound traffic on Huffine Lane will use Resort Drive to access the development. The intersection of Valley Commons Drive and Park Avenue is located 500 feet from Huffine Lane and would be designed with raised pedestrian crosswalks. This intersection is currently proposed as a four-way STOP to help facilitate the movement of pedestrians and vehicles through this area as soon as the areas east of Resort Drive begin to be developed. Park Avenue would end at a similar 3-way STOP intersection at Field Street to the North. The development would leave right-of-way to allow the construction of additional accesses to the west directly onto Cottonwood Road. This approach would be created when and if the adjacent properties to the west are developed. LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 6 June, 2013 Figure 2 – Proposed Development LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 7 June, 2013 E. TRIP GENERATION AND ASSIGNMENT ATS performed a trip generation analysis to determine anticipated future traffic volumes from the proposed development using the trip generation rates contained in Trip Generation (Institute of Transportation Engineers, Seventh Edition). These rates are the national standard and are based on the most current information available to planners. A vehicle “trip” is defined as any trip that either begins or ends at the development site. Judging from field observations and the typical nature of residential and commercial developments, ATS determined that the critical traffic impacts on the intersections and roadways would occur during the weekday morning and evening peak hours. At full build-out of L O T 4 the proposed development would produce 294 AM peak hour trips, 829 PM peak hour trips, and 6,422 daily trips. This generation value discounts traffic from the spa and putting range as this traffic will likely be mostly internal trips from the lodge. The trip generation rates and totals are shown in Table 3. Table 3 – LOT 4 Trip Generation Rates Land Use Size A M Peak Hour Trip Ends per Unit Total AM Peak Hour Trip Ends AM In / Out PM Peak Hour Trip Ends per Unit Total PM Peak Hour Trip Ends PM In / Out Weekday Trip Ends per Unit Total Weekday Trip Ends Hotel- Rooms 28 0.56 16 10/6 0.59 17 9/8 8.17 229 Rest/bar 30,000 S.F 0.81 24 18/6 9.02 271 168/ 103 89.95 2,699 Bank 9,000 S.F 12.34 111 62/ 49 45.74 412 206/ 206 246.49 2,218 Business Park 100,000 S.F. 1.43 143 120/23 1.29 129 30/99 12.76 1,276 Total 294 210/84 829 413/ 416 6,422 Trip Types Three basic trip types describe the traffic that will be generated by the proposed development. These trip types include the following: New Trips- This is the basic trip type created by all traffic generators. These trips are defined as those trips that occur only to utilize one traffic generator at a proposed development site. This trip can generally be characterized as one that runs from a home to a destination and back home. LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 8 June, 2013 Internal (Shared) Trips- These trips are created by associated facilities within or directly adjacent to the proposed development. The trips are combined into one joint trip to the development and do not represent additional trips on the surrounding road network. At present the types of land uses proposed for LOT 4 are not specific enough to create a meaningful calculation of shared trips. It is likely that this development will produce some internally captured trips, but it will likely be less than 5% of the total traffic from the project. Pass-By Trips are those characterized by a vehicle which enters the development on their way to another destination. Upon leaving the driver continues along the roadway to their final destination. Pass-By trips are not generally considered new trips on the surrounding road network because they would exist whether or not the development has been constructed. A common example of this type of trip is a driver which stops at a grocery store on their way home from work. Pass-by trips can be discounted from the through traffic on the adjacent roadways but must be included making the appropriate turning maneuvers at intersections. In particular banks and restaurants produce a large number of pass-by trips. According to the Trip Generation manual the two land uses produce 47% pass-by trips and 43% pass-by trips respectively. These pass-by trip levels were included in the traffic model for the project. F. TRIP DISTRIBUTION The traffic distribution and assignment for the proposed subdivision was based upon the existing ADT volumes along the adjacent roadways and the peak-hour turning volumes. This trip distribution is shown on Figure 3. Traffic is expected to distribute itself as follows: • 30% to/from the west on Huffine Lane, • 25% to/from the east on Huffine Lane, • 15% to/from the east on Babcock Street, • 10% to/from the north on Ferguson Avenue, and • 20% to/from the north on Cottonwood Road. Overall trip distribution characteristics and site-generated traffic are shown on figures in Appendix B. LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 9 June, 2013 FIGURE 3 - Development Trip Distribution G. TRAFFIC IMPACTS OUTSIDE OF THE DEVELOPMENT Using the trip generation and trip distribution numbers, ATS determined the future Level of Service for the area intersections. The anticipated LOS at these intersections with the proposed development is shown in Table 4. These calculations are based on the projected model volumes included in Appendix B of this report. Table 4 –Level of Service Summary With LOT 4 Spring Creek Village INTERSECTION A M PM D E L A Y LOS D E L A Y LOS Ferguson Avenue & Huffine Lane 15.4 B 20.3 C Ferguson Avenue & Fallon Street* 19.6/11.4 C/B 22.4/14.9 C/C Ferguson Avenue & Babcock Street* 20.9/20.3 C/C 28.1/45.4 D/E Huffine Lane & Resort Drive 10.1 B 14.5 B Huffine Lane & Cottonwood Road 18.3 B 20.7 C Cottonwood Road and Fallon Street* 13.0/13.2 B/B 16.7/11.7 C/B Cottonwood Road and Babcock Street* 13.7/13.3 B/B 11.2/10.4 B/B *Westbound/Eastbound Delay and LOS. Table 5 indicates that LOT 4 of the Spring Creek Village development will not alter the LOS at most of the near-by intersections. The one notably impact would be at the intersection of Fergusson Road and Babcock Street. This intersection is currently nearing its functional capacity and may need Huffine Lane LOT 4 20% 30% Babcock Street Fallon Street 25% 10% 15% LOT 4 Spring Creek Village Subdivision Bozeman, Montana Abelin Traffic Services 10 June, 2013 modifications to the traffic controls to provide additional capacity for this project and others projects currently underway in this area. If this intersection were converted to a four-way STOP controls from its current 2-way STOP control, the intersection would function at LOS C with 20.2 seconds of peak-hour delay with the additional traffic from the Spring Creek village project. ATS also reviewed the projected intersection volumes to determine if any additional right-turn deceleration lanes may be needed with the development of the Spring Creek Village Subdivision. As noted in Section C, the intersection of Huffine Lane and Cottonwood Road currently warrants the installation of a right-turn lane under existing traffic conditions. MDT has no current plans to construct this turn-lane. However, it should be noted that as proposed the Spring Creek Village will not contribute to the right-turn traffic at this intersection or the need for this turn lane. All traffic for the Spring Creek Village will use the entrances at Resort Drive and Park Avenue to access the development site. It is possible that Park Avenue or Resort Drive may also warrant the installation of a right-turn lane. There may not be sufficient length to construct three separate right-turn deceleration lanes in this area (Cottonwood Road, Park Avenue, and Resort Drive). It would be desirable to meet with the City of Bozeman and MDT to discuss the future build-out plans in this area and develop a configuration for the turn-lanes in this area based on the long-term development plans for this part of Bozeman. H. IMPACT SUMMARY & RECOMMENDATIONS As proposed, the development of LOT 4 of the Spring Creek Village Subdivision will have a minimal impact on the surrounding road system. Although the development may produce up to 6,000 new trips in this area, these vehicles will be distributed widely over the existing area road network and no intersections will see major additional traffic loads. The intersection of Fergusson Road and Babcock Street is nearing its functional capacity as a two-way STOP controlled intersection and may need to be modified to a four-way STOP to serve the additional traffic from the Spring Creek Village and the other developments currently underway in this area. Depending on the rate of development at the Spring Creek Village and the other developments in this area, this four-way STOP may be necessary before the intersection is measurably impacted by the Spring Creek Village project. The Spring Creek Village subdivision would benefit from a right-turn deceleration lane at Resort Drive or Park Avenue. It would be desirable to meet with MDT and the City of Bozeman to develop a plan for creating right-turn deceleration lanes in this area to meet the overall development goals of this area of Bozeman.