What is an Inductive Loop Traffic Detector?

An Inductive Loop Traffic Detector detects vehicle presence through induction. The inductive loop consist of coiled wires which are installed in the road and a logic unit. Vehicles passing the loop can be detected through a loop field change.

Further Reference:

• Federal Highway Administration (FHWA), Chapter 1, Chapter 2, Traffic Detector Handbook: Third Edition—Volume I
• Federal Highway Administration (FHWA), Traffic Monitoring Guide