From the Background: "Increasing the autonomy of cars and trucks is seen as an effective way to reduce the 94% of vehicle-related accidents that involve human error. While some semiautonomous safety technologies, such as automatic braking, are in use today, many autonomous technologies under development would require cars and trucks to communicate wirelessly with one another (vehicle-to-vehicle, or V2V) and with their surroundings (vehicle-to-infrastructure, or V2I). V2V communication is expected to reduce the number of accidents by improving detection of oncoming vehicles and providing driver warnings. V2I communication is expected to help highway operators monitor and manage traffic and provide drivers with information such as weather and traffic conditions."
CRS In Focus, IF11260
Congressional Research Service: https://crsreports.congress.gov/