Traffic & Transportation Engineering

From conceptual planning through final design, Carroll Engineering assists public and private clients in a wide range of traffic- and transportation-related issues. These include, as needed, review and preparation of traffic studies, parking studies and optimization, regional and sub-regional planning studies, plans and specifications for roadway signalization of all types, and pedestrian and inter-modal transportation enhancement; attendance at municipal meetings with elected and appointed officials and staff; and coordination with municipal staff, other consultants, residents, applicants and permitting agencies. The firm has served several municipalities as traffic engineering consultant. Our traffic engineer staff regularly provides design services that include traffic signal systems, signing upgrades and highway improvements for projects large and small.

Traffic & Transportation Engineering Services at Carroll include:

  • Traffic Signal Design
  • Traffic Calming
  • Roadway Design
  • Roundabout Design
  • Traffic Impact Studies
  • Highway Occupancy Permits
  • Utility Relocation
  • Railroad Coordination

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Carroll’s Traffic & Transportation Featured Projects


Station Road-Old Bethlehem Pike Roundabout
Client: Richland Township, Bucks County, PA

Old Bethelehem Pike Pic

CEC designers chose to design a roundabout, with the approach roadway entering at a perpendicular to slow traffic within the circle. The center island’s 20-foot wide concrete apron, which accommodates large vehicles, is treated with a product that simulates field stone to match the old Shaw homestead on the corner. CEC also did the traffic signal design and provided traffic calming services. This roundabout was the first of its kind in Pennsylvania.

Closed-Loop Systems
Client: Various Townships, Bucks, Montgomery and Chester Counties, PA

Closed Loop Pic

CEC traffic engineers have been involved in the engineering design process for several traffic-responsive, closed-loop systems throughout the region. Among them: 16 signals along the Easton Road (SR 0611) corridor in Horsham and Warrington Townships; 21-signal system in Phoenixville Borough, East Pikeland Township, and Schuylkill Township that coordinates SR 0023, as well as PA 113 and Bridge Street; 9 signals along the Main Street (SR 0016) corridor in Waynesboro Borough; 15-signal system along SR 0309 in Richland Township and Quakertown Borough.