Vehicle-to-Vehicle Communications 

Vehicle-to-Vehicle Communications

Vehicle-to-vehicle (V2V) technology allows equipped vehicles to wirelessly exchange information about surrounding vehicles’ speed and positions to help drivers better avoid crashes.

V2V uses dedicated short-range communications (DSRC), a variation of Wi-Fi tailored for moving vehicles. This technology allows vehicles to rapidly broadcast and receive messages (up to 10 times per second) so there is a 360-degree “awareness” of other vehicles in the proximity. Communication messages have a range of approximately 300 meters and can detect dangers obscured by traffic, terrain, or weather. Prototype V2V systems have used visual, tactile, and audible alerts—or a combination of these—to warn drivers of the potential for a crash.

The current proposed design for the V2V system employs strong security and is compliant with the latest standards from the National Institute of Standards and Technology, which develops guidelines, best practices, and standards for information technology systems. V2V technology does not exchange or record a consumer’s personal information, nor does it track a vehicle’s movements, which helps protect a driver’s privacy.

Because of the cooperative nature of the technology, the benefits are only realized when surrounding vehicles also are equipped with V2V communications, and maximum benefits are achieved when all vehicles can communicate with each other. To this end, NHTSA has worked with the automotive industry and academic institutions for more than a decade to advance V2V’s lifesaving potential into reality. NHTSA estimates that when fully deployed, V2V technology has the potential to address approximately 80 percent of multi-vehicle crashes. NHTSA plans to publish a rulemaking proposal on this important technology in 2016.

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