Abstract
Reports are cited on the development, calibration, testing, and operation of motor vehicle detectors and detection of traffic incidents on highways and roads. Research is included on freeway surveillance, closed circuit television, electronic reconnaissance, magnetic measuring devices, traffic flow mom-tors, sensor configurations, and photo detectors.Investigations of snow and ice detection on bridges are noted. Other topics are rear sensors, automatic control equipment, communication, diamond interchange traffic,headway monitoring, critical intersections, overweight truck load detection, and the placement of detectors.