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August 5, 2020 <br />Mr. Chuck Edwards, PE, District Engineer <br />Page 3 of 15 <br />Reference: Research Triangle Logistics Park TIA Supplement <br /> <br /> <br /> <br />Old NC 86 & I-40 Eastbound Ramps <br />Similar to the adjacent ramp intersection, the TIA that for Settler’s Point included a signal warrant analyses <br />for this intersection. It was noted that warrants were met for signalization in the no build condition. Due to <br />the data collection restrictions caused by the Covid Pandemic, the same data were used for the Research <br />Triangle Logistics Park, so the same results would apply to this study. <br />A signal was recommended at this location due to the excessive delays for the overall intersection and the <br />eastbound approach in the no-build condition. There is a significant southbound left turn movement <br />(exceeds 500 under the existing condition) coming from Hillsborough and the Waterstone Development. <br />The reported delays and queues from Synchro are assuming a very conservative analysis with protected <br />only movements and optimized splits. With the proposed left-over at the Service Road, a greater amount of <br />green time can be given to the southbound left since it will not be an issue to queue beyond the Service <br />Road. Additionally, it should be noted that the TIA assumed full build out of Waterstone while the <br />development is only partially built out. Therefore, delay estimates are very conservative. The I-3306A <br />project will install additional lanes while the U-5845 project will install a traffic signal and additional turn <br />lanes at this location. <br />Therefore, based on this additional information, we recommend that the developer install a temporary signal <br />with wood poles at this location to accommodate traffic until the planned projects construct additional turn <br />lanes and a signal in the final configuration can be installed. <br />Old NC 86 and Service Road Intersection: <br />Based on the current spacing of intersections and issues noted , the development will revise the access at <br />this location to provide a right in / right out with a left over into the site. Just north of the service road, there <br />is a residential parcel that has a property line which appears to extend almost to the edge of pavement and <br />may prohibit widening of pavement in this area. This is shown on the attached public hearing map. <br />Therefore, the following improvements are recommended at this location assuming that they can be <br />accomplished within the existing right of way by shifting the existing lanes and restriping the pavement. <br />x Restripe Old NC 86 in the vicinity of the Service Road to provide the following within the existing edges <br />of pavement: <br /> An exclusive northbound left-turn lane with the amount of full-width storage with appropriate <br />transitions to the greatest extent possible within the existing pavement. <br /> An exclusive southbound right-turn lane with 100 feet of full-width storage or a lesser amount to the <br />greatest extent possible with appropriate transitions within the existing pavement. <br /> <br />48