“Channelization – geometric improvement normally applied at intersections to simplify movements of vehicles to lead drivers to face one conflict at a time.
Clearance interval – the sum of yellow and all-red period in between phases.
Clotoid – a spiral that serves as a transition path as the vehicle enters or leaves a circular curve.
Compound curve – a two-arc simple curve having its centers on the same side of the common tangent.
Cordon counts – counts used to determine the number of vehicles and/or persons entering and leaving an enclosed area.
Crest vertical curve – a vertical curve with the parabolic curve drawn below the two tangents.
Critical gap – describes the minimum gaps needed by drivers of minor road vehicles.
Cycle – one complete indication of green, yellow, and red signals.
D/D/l – a sing-server queuing system with regularity of both arrivals and departures.
Delineators – small reflective panels or buttons mounted on guide posts or guard fences as an effective aid for night driving.”
Other terms will be posted next week. So, wait and learn more.