Trials undertaken to compare 4 different methods of traffic control on the 3.5 km ring road in Aix- en- Provence during the evening rush hour are described.The 4 traffic signal control regimes tested were: (A) reference mode, correspond- ing to optimized fixed signal plans using THEBES; (B) A "Green Wave" corresponding to usual settings used by the city (average speeds being 44 km /hr); (C) an adaptive algorithm, based on a real time system; and (D) partial dissynchronization. Results showed that energy conservation was highest with the THEBES optimized fixed time plans.
Abstract