2017.04.17 CC Packet - Laserfiche WebLink

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Adelaide Landing Residential Development EAW, Hugo January 31, 2017 No traffic safety issues are apparent, although increased delay and queuing may cause driver frustration; no safety mitigation is recommended. 2040 No -Build Condition TH 61 & 140th Street operates at LOS-F in the p.m. peak hour, and TH 61 & 130th Street operates at LOS-D in both the a.m. and p.m. peak hours. Both intersections are impacted by the lack of available through capacity along the two-lane section of TH 61. o Reconstruction of TH 61 to a four -lane section with turn lanes in this area will improve traffic operation to LOS-C or better at all study area intersections along TH 61. o The eastbound left turn movement of 140t Street at TH 61 operates at LOS-E. By creating a dedicated eastbound left turn lane and installing lead -lag left turn signal timing at that intersection, traffic operation will improve. o The westbound left turn movement at TH 61 & 134th Street operates at LOS-E in the p.m. peak hour. This is primarily due to the heavy northbound traffic flow and the inability for 134th Street traffic to find adequate gaps in the traffic to complete their left turns. This may be mitigated by restricting left turns in the p.m. peak hour as a safety and operation measure. The increased delay and operational issues identified will impact driver safety. Therefore, the need for widening of TH 61 to four lanes with turn lanes should be reviewed regularly from a safety standpoint. o MnDOT and Washington County entered into a Memorandum of Understanding (MOU) in 2008 related to the long-term future of TH 61. The improvements recommended above are not currently in MnDOT's 20-Year Plan. 2022 Build Condition No intersection operates below LOS-D; however, TH 61 & 140th Street experiences excessive delay in the eastbound direction and increased queuing in the southbound left direction during the p.m. peak hour. If no signal timings changes are made in 2020, the eastbound queue extends beyond 300 feet, while the southbound left turn queue extends beyond 500 feet. These may be mitigated by geometric and signal timing improvements (if deemed necessary by MnDOT). Increased delay is identified at the westbound left approaches to TH 61 at 137th Street and 134th Street. It is recommended that east legs of the intersections be restriped to create one inbound (eastbound) lane and two outbound (westbound) lanes (e.g., one left turn lane and one right turn lane). The westbound approach of 137t' Street is 33 feet wide, which is capable of being striped with three 11-foot lanes. The westbound approach of 134`' Street is approximately 32 feet wide, which can accommodate two 11- foot lanes and a 10-foot lane. No operational issues are identified along 130th Street in conjunction with the new development. o All intersections with 130th Street will operate acceptably with basic single lane street approach to 130th Street without turn lanes into or out of the development. o Nevertheless, capacity is not the only issue. Pedestrian access, safety and roadway width/condition area also factors. The roadway is in the City's Capital Improvement Plan for improvement to collector standards. Timing of the project would be based on development phasing. 34