Agenda - Planning Commission - 08/02/2018

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• S Diamond Lake Road/Pineview Lane, Dayton River Road/S Diamond Lake Road, Dayton River Road/Brockton Lane, and 129th Avenue/Pineview Lane experience failing operations by the 2040 No -Build scenario. • N Diamond Lake Road/Brockton Lane, Dayton River Road/Pineview Lane, Dayton River Road/N Diamond Lake Road, and N Diamond Lake Road/Zanzibar Lane experience failing operations by the 2040 Build scenarios. Due to general background growth and adjacent specific developments, the following mitigation is recommended with or without the proposed North Dayton development for the year 2025: • Continue to explore options for corridor improvements on the TH 169 and CSAH 81 corridor with other agencies. • Re -stripe the Dayton River Road approach to TH 169 to provide dual left turn lanes, a left turn/through lane, and a right turn lane. Additional pavement on northbound TH 169 between the Dayton River Road and river bridge will be necessary to accommodate this change. • Update signal timing at all signalized intersections at least every three to five years. • Construct a single -lane roundabout at the N Diamond Lake Road/Brockton Lane intersection. Reserve right-of-way at this intersection for future dedicated right turn lanes. A traffic signal with dedicated turn lanes could also provide the necessary capacity at the intersection, although a roundabout is preferred due to improved safety and better off-peak operations. Accounting for additional traffic from the proposed development, the following mitigation will also be necessary to accommodate the full projected 2025 volumes: • Construct a single -lane roundabout at the Dayton River Road/Pineview Lane intersection. Reserve right-of-way at this intersection for future dedicated right turn lanes. A traffic signal with dedicated turn lanes could also provide the necessary capacity at the intersection, although a roundabout is preferred due to improved safety and better off-peak operations. For intersections where a roundabout or a traffic signal is proposed, a detail Intersection Control Evaluation will be necessary. This document will evaluate the two control options and document the decision for which option is ultimately constructed. For the purposed of this document, roundabouts are the preferred option. Beyond year 2025, the long-range time frame and uncertainty of potential developments, roadway network, and travel patterns result in multiple assumptions for this analysis. Due to this inherent uncertainty, year 2040 recommendations should not be constructed today. Instead, right-of-way should be preserved for these needs when required based on actual traffic growth. The following modifications to the study roads and intersections, assuming the planned roadway network is implemented, are recommended for the year 2040 to address Traffic Impact Study 28 North Dayton Development 12IM CONSULTING