USN-based architecture for traffic management

This paper reviews a general USN (Ubiquitous Sensor Network)-based architecture of traffic management which consists of wireless sensors, wireless APs (access points) and central traffic controller. Since thousands of thousand sensors installed on the roads in a huge physical area send and receive through wireless coordinators and AP traffic data such as vehicle detection, classifications and speed measurements, a central traffic controller is required to produce meaningful information for users. Particularly, it is of paramount importance to relate time-specific, location-specific and contents-specific information one way another. This paper reviews the recent updates of advanced methodologies for vehicle detection and classification sensors, USN network elements such as wireless coordinators (Zigbee) and AP (Wi-Fi or WiMAX(Worldwide Interoperability for Microwave Access)), and RIA (Rich Internet Application)-based user interfaces. This paper also introduces an application of new standards KML (Keyhole Markup Language) to USN-based traffic management systems.