US regulators propose cyan lights to signal driverless robotaxis

The National Highway Traffic Safety Administration has released proposed revisions to Federal Motor Vehicle Safety Standard No. 108 aimed at autonomous vehicles. The changes would ease rules that hinder designs without human drivers and create a standard way for robotaxis to communicate with other road users. A central proposal is a distinctive cyan, or blue-green, marker lamp that would clearly signal to law enforcement and others that a vehicle is operating itself. The move ends years of debate over how driverless cars should indicate that no one is at the wheel, which previously included ideas like text displays, audio alerts and custom lights. The article is an excerpt, so further details on the proposal's timeline or comment process are not included here.