The head of NHTSA is sounding the alarm over what he calls "a disturbing trend" in recent months: AVs interfering with first responders.

The rules of the road for AVs are being written in real time in Washington and in statehouses and city halls across America.

The head of NHTSA is sounding the alarm over what he calls "a disturbing trend" in recent months: AVs interfering with first responders.