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Adelaide Landing Residential Development Traffic Impact Analysis 1/31/2017 o The eastbound left turn movement of 140th Street at TH 61 operates at LOS-F in the unmitigated scenario. By creating a dedicated eastbound left turn lane and installing lead -lag left turn signal timing at that intersection, traffic operation will improve. o Because so much signal timing must be allotted to the north -south movements on TH 61, the side street and turn movement timings fail at 130th Street. The four -lane improvements along TH 61 would improve signal operation and overall intersection performance along the corridor. o The westbound left turn movements at TH 61 & 134th and at 137th Streets operates at LOS-F in the p.m. peak hour. This is primarily due to the heavy northbound traffic flow and the inability for side 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 widening of TH 61 to four lanes with turn lanes is recommended from a safety standpoint. ➢ 1301h Street east of TH 61 is assumed to be reconstructed to Urban Collector Standards, as identified by the City's CIP. This will include turn lanes at the development intersections. (Details of the design are being established by others.) o Westwood has prepared a Turn Lane Design Checklists per MnDOT and the Minnesota Local Road Research Board for each arterial/collector intersection to define turn lane and transition length (See Appendix). ➢ From a safety perspective, however, a reduction in speed limit to 40 mph is recommended for both directions along 130th Street from TH 61 to the east property line of the Adelaide Landing development. There are no definitive plans found on the Mn/DOT website, the Washington County website or the Met Council's Strategic Transportation Plan other than that listed in the report. It is apparent that TH 61 will be widened at some point, but no project details or timing can be found. 44 Westwood