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Recently, considerable research was focused on applying ad hoc wireless networking technology to on-the-move vehicles. In this paper, the authors focus on distributed detection of dangerous vehicles on roads and highways. They propose DVDP (Dangerous Vehicle Detection Protocol) to detect drivers who violate the permitted speed limit. In DVDP, each vehicle collects surrounding vehicles' IDs, and propagates warning information (including its position, speed, time, and collected IDs). These information are then forwarded hop-by-hop using ad hoc communications. A vehicle that receives this information will start to observe its surrounding vehicles. If surrounding vehicles are identified in the received warning information, it will estimate the speed of such vehicles.
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