Agenda - Council - 06/13/2017 - Laserfiche WebLink

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Executive Summary Background: The Capstone Homes Development is proposed for construction on the vacant land bounded by Puma Street, Alpine Drive, Trunk Highway (TH) 10, and Links at Northfork Golf Course in Ramsey, Minnesota. This development will include 344 total residential units (98 townhomes and 246 single family homes). The purpose of this study is to determine the traffic impacts associated with the build out of the proposed development on the study intersections. Results: The principal findings of this traffic study are: • The proposed expansion is expected to generate approximately 2,912 new trips during an average weekday (1,456 entering and 1,456 exiting), approximately 227 new trips during the a.m. peak hour (53 entering and 174 exiting) and approximately 297 new trips during the p.m. peak hour (189 entering and 108 exiting). • The existing study intersections operate with acceptable delays and vehicle queues today with slightly increased queueing and delay at TH 10/Alpine Drive. • The study intersections are expected to operate acceptably during the 2040 no -build and build scenarios with the exception of TH 10/Alpine Drive. • TH 10/Alpine Drive experiences slightly higher than preferred queueing along Alpine Drive, however this is expected at side street stop controlled intersection with heavy mainline volume. • Left turn lanes are not warranted based on the expected 2040 build year volumes and mainline speeds. • Right turn lane warrants are not fulfilled due to the mainline speeds remaining below 45 MPH, which is consistent for neighborhood streets, however, the right turn lane volume thresholds were reached by the estimated 2040 Build volumes. • There are no safety concerns with regards to turn lanes, due to the low queues, minimal delay, and good sight distance provided at all site accesses Recommendations: The following items are recommended based on the analyses contained in this study: • No additional intersection mitigation is required to help improve capacity. However, the TH 10/Alpine Drive intersection should be monitored to determine when volumes breach the Eight -Hour Traffic Signal Warrant as the projected volumes are heavily dependent on a number of anticipated developments that are not guaranteed to occur. • Coordinate TH 10/Alpine Drive improvements with MnDOT once the Eight Hour Warrant is exceeded. • If the speed limits along Puma Street or Alpine Drive are increased to 45 MPH or higher, re-evaluate the Turn -Lane warrants. • Construct a new sidewalk/trail along the southern edge of Alpine Drive connecting the proposed access to the existing Alpine Drive/Puma Street intersection. The addition of a north/south crosswalk should also be considered at this intersection to help promote safe crossing to the existing northern sidewalk/trail. • Ensure the proposed internal sidewalks connect to the external sidewalk/trail system. • Work with Metro Transit or their affiliates to improve transit options within the project area as the closest existing transit is located roughly 1.5 miles away at Ramsey Station and Platform. This study is based upon a concept plan from January 6, 2017. Assuming the general characteristics of the proposed development remain approximately the same as documented, minor changes in the final design are not expected to alter the results or recommendations of this study. Traffic Impact Study Capstone Homes Residential Development NSULTING