Development of an Overhead Vehicle Censor System

摘要

The current practice of installing traffic sensors on or in the highway has often caused serious traffic delays and congestion due to lane closures along with hazardous working conditions for the Department's employees. In recognition of these problems and with the recent availability of non-contact sensor technology, the Department funded Study 426, "Development of an Overhead Vehicle Sensor System."nThis report presents the research and results of this study along with pro¬cedures for operating the prototypes which were constructed. After careful eval¬uation, a prototype was constructed using the infrared sensor technology. However, it was discovered that the infrared was too sensitive for use as a remote vehicle sensor. After further investigation, an ultrasonic ranging device was chosen for implementation as an overhead vehicle sensor.