Getting the message about road safety

This paper reviews a range of problems in the road transport field and the potential role of vehicular ad-hoc network systems (VANETs) in helping to solve them. In reality, the communications requirements vary widely from one application to the next, in terms of range, latency, and connectivity together with vehicle and roadside hardware. Based on the nature of the wireless channel, this presents some challenges for communication to security. The paper concludes with a summary of the current state of VANET technology and presents a summary of the challenges to be found in each approach.