An example is vehicular accident warning systems, which advertise accident events to approaching vehicles.
To reach this goal, VANET-based accident warning systems require the design of efficient broadcast algorithms.
The effectiveness of currently in use vehicular accident warning systems can be jeopardized by their: (a) inability to provide an accident warning to the closest approaching vehicles; and, (b) high delays in advertising an event.
Second, we devise a fast and secure inter-vehicular accident warning protocol which is resilient against the position cheating attack.
By leveraging on the distributed nature of ad hoc networks, accident warning systems can rapidly alert the vehicles which most risk their involvement in a crash.
VDL-2 and 3 provides a service which checks general accident status and large accident status such as alarm service of airbag and secondary accident warning to inform the accident status to the family of the user.
VANET is one of the important components of an intelligent transport system because it holds great potential in traffic accident warning, traffic flow control, as well as in providing information services and extra serviceability.
With this technology, many traffic-related applications, such as accident warning systems, congestion detection schemes, and traffic-related information broadcasts, can be implemented to provide more comfortable driving experiences.
Besides the delivery of infotainment services, the role of typical V2I systems will include the provisioning of safety related, real-time, local, and situation-based services, such as speed limit information, safe distance warning, lane keeping support, intersection safety, traffic jam, and accident warning, etc.
