Adaptive Traffic Signals
نویسنده
چکیده
Adaptive traffic signals have had a checkered history in the U.S.A., and many professionals are unsure about whether the benefits justify the costs. The FHWA sponsored research into adaptive signals and several systems have now been developed to the stage where demonstration projects are underway (e.g., RHODES and OPAC). At the same time several adaptive systems (e.g., SCATS and SCOOT) have been operating successfully in many other countries, but have had limited use in the U.S.A. This paper examines the reasons why the existing successful systems have failed to gain acceptance, why the newly developed systems have not yet been successfully demonstrated, and questions the validity of the reasons commonly put forward for this situation.
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