Los Angeles, California, United States
Automated Traffic Surveillance and Control (ATSAC) Evaluation Study
Summary Information
The Automated Traffic Surveillance and Control Program (ATSAC) in Los Angeles, California, has operated computerized signal control systems since 1984. As of 1994, it included 1,170 intersections, and 4509 detectors for signal timing optimization.
FINDINGS
The system reportedly reduced vehicle stops 41 percent, reduced travel time 18 percent, increased average speed 16 percent, and decreased delay by 44 percent.