Managing Traffic With Real-Time Transponders

by Richard W. Doering, Senior Staff Engineer; Syntonic, 10260 Campus Point Dr. MS-G2, San Diego, CA 92121-1522,

Serial Information: Civil Engineering—ASCE, 1994, Vol. 64, Issue 9, Pg. 68-69

Document Type: Feature article


The same technology that automatically bills a driver rolling through a toll gate can be extended to provide automated electronic information required by operators of Intelligent Vehicle Highway Systems (IVHS) and intermediate traffic monitoring and management systems. In addition to collecting tolls, Automated Vehicle Identification (AVI) technology is replacing traditional automatic data collection via roadway loops, acoustic and microwave detectors, video surveillance and detection, weather/road monitors and driver reports by radio or cellular phone. AVI equipment suitable for high speed roadways includes three types of transponders: Type I, read-only; Type II, read/write; Type III, read/write with display of data to the driver and/or inputs from the driver or vehicle computer. Based on successful testing or installations, the author concludes that an ETTM system must have high performance radio-frequency with sufficient range and speed to accommodate the variety of vehicles at high roadway speeds.

Subject Headings: Intelligent transportation systems | Driver behavior | Traffic management | Highways and roads | Tolls | Vehicles | Systems management | Automatic identification systems

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