Transport by road will shortly be transformed by a communications revolution, enabling new forms of telematics services. Particularly significant is the emergence of Dedicated Short Range Communication (DSRC), leading to the generation of ad hoc networks between vehicles and between vehicles and the infrastructure. Considerable effort, particularly in the US, has gone into identifying uses for ...

Limited availability of the Global Navigation Satellite System (GNSS) signals in urban canyons is a preventive factor for implementing many position-based systems. Specifically for vehicles, a variety of applications such as Intelligent Transportation Systems (ITS), navigation, and Location-Based Services (LBS) are not properly functional in dense urban areas due to constrained visibility of th...

Wireless vehicular networks operating on the dedicated short-range communications (DSRC) frequency bands are the key enabling technologies for the emerging market of intelligent transport system (ITS). The wireless access in vehicular environments (WAVE) is significantly different from the Wi-Fi and cellular wireless networking environments. The specifications defined by IEEE802.11P and IEEE160...

We present an adaptive communication scheme for Cooperative Active Safety System (CASS). CASS uses information communicated from neighboring vehicles via wireless communication in order to actively evaluate driving situations and provide warnings or other forms of assistance to drivers. In CASS, we assume that vehicles are equipped with a GPS receiver, a Dedicated Short Range Communications (DS...

Broadcast messages will play a large role in Vehicular Ad Hoc Networks (VANET). A large portion of the messages sent in a vehicular network will be broadcast messages. Broadcast messages may play a larger role than the use of unicast messages in VANETs. Some of the uses for broadcast messages are: sending emergency warning messages, transmitting state information to other vehicles, broadcasting...