Agenda - 09-15-20; 5-a - Zoning Atlas Amendment - Master Plan Development Conditional Zoning District (MPD-CZ) for the Research Triangle Logistics Park (RTLP)

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RESEARCH TRIANGLE LOGISTICS PARK TRAFFIC IMPACT ANALYSIS at the intersection of Old NC 86 at I-40 Eastbound Ramp with a flashing yellow arrow would allow more efficient left- turn operation in addition to increasing the green time given to the northbound through movement. This reallocation of green time would lessen the time during which queues block left-turning traffic from the Service Road onto Old NC 86. Furthermore, if long delays occur during peak periods, it is possible for traffic exiting the development to utilize access onto Davis Road. It should be noted that the southbound right-turn from Old NC 86 onto the Service Road meets the requirements for an exclusive right-turn lane according to the chart contained in the North Carolina Department of Transportation Policy on Street and Driveway Access to North Carolina Highways. A right-turn lane is not recommended as the right-of-way does not appear to be available to construct this lane. Delay is anticipated to be minimal on this approach as the southbound right-turn is free-flowing. No improvements are recommended at the intersection of Old NC 86 at I-40 Westbound ramps. The westbound left- turn operates at LOS F with the addition of the proposed development traffic. However, SimTraffic maximum observed queues are less than the current 225 feet of provided storage in both the AM and PM peak hours. It is not uncharacteristic of stop-controlled approaches to unsignalized intersections to operate at failing levels of service during the peak hours and it should be noted that the westbound right-turn flows freely. It should be noted that all other movements operate at LOS B or better at this intersection. Using the traffic analysis presented herein, recommendations are provided to mitigate the impacts associated with the proposed development. With the recommended improvements in-place all study intersections and approaches operate at LOS D or better during both peak hours; with three (3) exceptions: x The westbound left-turn from the I-40 Westbound ramp onto Old NC 86 operates at LOS F. Stop-controlled approaches to intersections often operate with longer delays during peak hours. Additionally, the analysis shows that the existing turn-lane storage is not exceeded. x The eastbound and northbound approaches to the intersection of Old NC 86 at I-40 Eastbound ramp operates at LOS E. However, the overall LOS at this intersection is D. x The eastbound approach of the Service Road onto Old NC 86 operates at LOS E. Stop controlled approaches to intersections often operate with longer delays during peak hours. The analysis presented herein is conservative as it assumes that a significant portion of Waterstone is completed by the time the proposed development is opened in 2023. Furthermore, NCDOT has two (2) planned projects in the area in U-5845 (Churton Street Widening) and I-3306A (I-40 Widening) that will make further improvements to transportation infrastructure within the study area. 125