The detection of freeway capacity reducing incidents by traffic stream measurements. Paper prepared for the 53rd Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1974.

This paper is an investigation of the feasibility of using traffic flow information compiled in real-time by freeway traffic surveillance, communication, and control systems for detection of accidents, vehicular break-downs, and other incidents that temporarily block traffic lanes. Various aspects of the detection system are discussed.