The Gowanus Expressway/Prospect Expressway rehabilitation project in Brooklyn, NY has one of the most advanced incident detection systems presently deployed in the US. The system consists of an Autoscope automated incident detection system and 20 closed-circuit television (CCTV) cameras with pan/tilt/zoom capabilities. Other technologies in place include highway advisory radio (HAR), dynamic message signs (DMS), and a construction information hotline. Processors analyze the data from the CCTVs and determine speed, occupancy, and volume of the vehicles. An alarm sounds if an incident is detected, alerting the traffic control center operators.
Before the incident detection system was introduced it took an average of 1.5 hours to clear any type of incident. Since implementation of the system, the time it takes to aid a motorist whose vehicle has broken down has been reduced to 19 minutes. If an accident occurs, the average time from inception to clearing is now 31 minutes on average.