schwit1 sends word that the Dept. of Transportation's National Highway Traffic Safety Administration has given notice of a proposal (PDF) for a new car safety standard that would require vehicle-to-vehicle communication equipment in all new passenger cars and light trucks. The NHTSA thinks this will facilitate the development of new safety software for vehicles. They estimate it could prevent over 500,000 crashes (PDF) each year. "Some crash warning V2V applications, like Intersection Movement Assist and Left Turn Assist, rely on V2V-based messages to obtain information to detect and then warn drivers of possible safety risks in situations where other technologies have less capability. ... NHTSA believes that V2V capability will not develop absent regulation, because there would not be any immediate safety benefits for consumers who are early adopters of V2V." The submitter notes that this V2V communication would include transmission of a vehicle's location, which comes with privacy concerns.