Determining the Capacity Benefits of Real-time Signal Control at Intersections

This report describes a study which evaluated the effectives of critical intersection control (CIC) at seven signalized intersections in the City of Los Angeles.  CIC involves the use of real time traffic data to better assign green times to conflicting movements.  The findings indicate that CIC generally improves traffic operations. Additional test sits will be evaluated, leading to guidelines and adjustment factors for estimating intersection performance under CIC using the Highway Capacity Manual and other analysis techniques.