News:

Suffolk County Closed Loop Signal	Beneficiary: (November – December 2003) (April – June 2004) ATR and Manual turning movements counts Company Name: Greenman Pedersen, Inc. 325 West Main Street Babylon, NY 11702 Tel.: (516) 587-5060 Reference: Mr. Paul Lindgren Cost: $74,810
Inductive loop detector. An inductive loop is simply a coil of wire embedded in the road's surface. The traffic signal system constantly tests the inductance of the loop in the road, and when the inductance rises to certain threshold, a vehicle is detected and traffic signal system will allocate green time accordingly.