Durham, N.C.


We played a large role in the modernization and expansion of the City of Durham computerized traffic signal system, which includes 387 signals. For 20 locations we prepared signal designs and electrical details for new controllers (2070 LX) that made it possible to increase the platform’s performance and accuracy. We also prepared traffic signal and CCTV camera cabinet inventories, and we designed the entire proposed CCTV digital camera system for 127 locations and the video wall required for the system. We also prepared the CCTV Site Study Report and performed QA/QC reviews on utility make-ready plans, construction plans and specifications.

We also developed emergency vehicle preemption wiring details for the City’s new GPS-based preemption system. This system allows emergency vehicles to pass through intersections more safely by communicating their GPS location to the traffic signals. This work helped emergency vehicles to move more effectively through high traffic areas while also preventing accidents or collisions with commuters. Additionally, the 2070LX controllers installed allow certain corridors within Durham to communicate traffic information to autonomous cars, which allows automobile manufacturers to use those corridors for tests and research.

As the city grew and their signal system reached over ten years of age, the City of Greenville sought out consultants to expand and rehabilitate their systems. Our ITS/Traffic Engineering department is part of the team doing the design of the expansion and rehabilitation. The project consists of 155 signalized intersections, 24 CCTV cameras and 58 miles of fiber optic cable.

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We had a large role in the modernization and expansion of the Burlington-Graham computerized traffic signal system which includes new controller and cabinet assemblies at approximately 203 signals. We performed traffic signal cabinet inventories, traffic signal designs and electrical programming details for 2070LX controllers using ASC/3 software at five intersections.

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Our ITS/traffic engineering team completed a traffic signal design, electrical programming detail, communications cable routing plan and fiber optic splice detail for the intersection of Ramsey Street and Eastwood Avenue (06-1178) in Fayetteville, North Carolina. Work includes performing field investigations and coordination with utility agencies to determine placement of traffic signal metal poles.

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