Active-infrared overhead vehicle sensor

摘要

An active-infrared overhead vehicle sensor capable of detectingnvehicle (moving or stationary) presence, classifying type of vehicle,nand measuring vehicle speed is described. The results of tests conductednat a street intersection in Orange County, Florida are presented. Thentest results demonstrate that the sensor reliably (99.4%) detectsnvehicles including cars, trucks, buses, and motorcycles and measuresntheir speed to within ±1 mi/h (1.6 km/h) at speeds up to at leastn50 mi/h (80 km/h)