A number of wireless technologies have been developed in recent years to meet the increasing needs of high-speed wireless communications in civil and military applications. The advances include WiFi (IEEE 802.11), WiMAX (IEEE 802.16), sensor networks, wireless Mesh/Ad hoc networks, mobile IP, smart antenna, cognitive radio, and so on. These emerging technologies will significantly impact the design and operation of Intelligent Transportation Systems, which aims to effectively provide higher vehicles safety, traffic management, and communications among vehicles and transport infrastructure.Organized into three parts, 'Wireless Technologies for Intelligent Transportation Systems' provides readers a thorough technical guide covering various wireless technologies developed in the most recent years for Intelligent Transportation Systems applications. It presents key technologies of circuits and physical layer, network protocols, system designs and applications. The broad content covers topics of radar sensor, radio channel modeling, smart antenna, medium access control, routing protocol, data dissemination, handover, security, mesh networking, road traffic estimation and monitoring, and location-based services.This comprehensive book is a collection of basic concepts, major issues, design approaches, application examples, and future research directions of various advanced technologies developed for Intelligent Transportation Systems. With its broad coverage allowing cross reference, it serves as an essential reference for engineers, researchers, students, scientists, professors, designers and planners of Intelligent Transportation Systems.