US regulators pick a new radio standard for cars to talk to roads and each other

The US communications regulator is forcing a switch in the radio technology cars use to talk to traffic lights and other vehicles. This means older communication systems will be phased out, and new cellular-based systems will become the standard.

For years, two competing technologies fought to be the standard for vehicle-to-everything communication. This rule ends that fight by picking one. It clears the way for carmakers and cities to invest in a single, mandated system for smart roads and safer driving.