ABSTRACT
Countries around the globe are adopting intelligent transportation systems (ITSs) for monitoring and control of vehicle tra«c on highways and major urban roads [1-3]. A typical state-of-the-art ITS collects and transports real-time tra«c sensor data to one or a few tra«c management centers (TMCs) for analysis and response. Ÿe communication network connecting sensors to TMCs thus determines the sustainable scope and response e«cacy of the system. Most of today’s ITSs rely on wired network links between sensors and TMCs, and the costs of deploying and maintaining the cables become one major limiting factor for ITS coverage. Looking into the future, connecting sensors with wireless networks is increasingly more favorable for their higher cost e¡ectiveness and faster deployment [4,5].
