Orange County NC Website
Browse       Search
49 <br /> US 70 Multimodal Corridor Study <br /> 4.3.5.2 Intersections <br /> Peak hour LOS measures the adequacy of the intersection geometrics and traffic controls of a particular <br /> intersection or approach for the given turning volumes. LOS ranges from A through F, based on the average <br /> control delay experienced by vehicles traveling through the intersection during the peak hour. Control delay <br /> represents the portion of total delay attributed to traffic control devices (e.g., signals or stop signs). The <br /> engineering profession generally accepts LOS D as an acceptable operating condition for signalized <br /> intersections in urban areas and LOS C for rural areas. <br /> At unsignalized intersections, LOS E is generally considered acceptable only if the side street encounters delay. <br /> Nevertheless, side streets sometimes function at LOS F during peak traffic periods; however, the traffic <br /> volumes often do not warrant a traffic signal to assist side street traffic. <br /> Intersection LOS analyses were performed for the typical weekday AM and PM peak hours using <br /> Synchro/Sim Traffic Professional Version 77. Figure 14 graphically depicts the worst case (AM or PM peak) LOS <br /> for signalized intersections and unsignalized approaches, as well as identifying locations with potential for <br /> queuing problems. <br /> All signalized intersections analyzed operate acceptable overall LOS during peak hours, and conditions are <br /> generally similar overall between both peak hours. Mainline US 70 generally experiences a better LOS than the <br /> cross streets at each intersection. Most side streets operate at an acceptable LOS during both peak hours <br /> except for a few intersections between Durham and Hillsborough. Mt. Herman Church Road and Pleasant <br /> Green Road operate at LOS F during both peak hours. At Lawrence Road, the northbound approach operates <br /> at LOS E during the AM peak, and the southbound approach operates at LOSE E during the PM peak hour. <br /> Between the Mt. Herman Church Road/Pleasant Green Road and Lawrence Road intersections is the <br /> unsignalized US 70 Bus/Palmers Grove Road intersection. The NB US 70 Bus approach operates at LOS F <br /> during both peak hours (with worse delay in the PM), and the SB Palmers Grove Road approach operates at <br /> the LOS D during the AM peak hour and LOS E during the PM peak hour. These LOS deficiencies are due <br /> mainly to vehicles waiting to turn onto US 70, although crossing and right-turning vehicles contribute. <br /> �a <br /> INA <br /> g <br /> z a�P c°j a <br /> c a <br /> G° de <br /> y �c` <br /> 1a <br /> ` �j Q R �a <br /> o a a <br /> •k 4•¢ <br /> �.� Loc •'• • . <br /> 65 <br /> O Signalized Intersection 8 Stop-Controlled Approach c � as 4a 14' <br /> LOP i A-C .D E-F r_ Potential Queueing Problems <br /> `Worst case from AM and PM peaks 2 <br /> From Lawrence Road Development TIA <br /> From NC 86 Connector Study(2019) <br /> Figure 14 Worst Case Intersection Level of Service Summary for US 70 <br /> Combined with heavy peak-hour traffic, high speeds and some visibility constraints create long delays as <br /> drivers wait for adequate gaps in traffic. <br /> 40 Existing Conditions and Critical Issues <br />