NHTSA proposes cyan lights to show when automated driving is in control

A blue-green light could give people outside a vehicle a clearer answer to a growing question: who is doing the driving?

On October 23, the National Highway Traffic Safety Administration announced proposed standards for optional cyan marker lamps on vehicles equipped with automated driving systems. The lamps would identify when the ADS is operating the vehicle, giving police and other road users a consistent visual cue.

The important distinction for pedestrians: that cue would describe the vehicle’s operating status. It would not tell someone that the vehicle has seen them or that it is safe to cross. Drivers nearby would likewise need to read the vehicle’s movements and conventional traffic signals, rather than treat cyan as a promise about its next maneuver.

The proposed rule describes ADS operation without the expectation that an occupant is monitoring the road. That is different from ordinary Level 2 driver assistance, which still requires human supervision. Manufacturers could choose whether to fit the marker lamps; those that did would face standardized specifications. This is a proposal, not a final rule or a requirement for every automated vehicle to carry cyan lights.

The broader package also proposes changes to manual lighting controls for vehicles operated only by ADS, plus headlamp testing and layout provisions. It does not amount to blanket authorization for driverless deployment.

For JetsonsAge readers, the significance is a possible shared visual language for increasingly mixed human-and-machine traffic. Demonstrating a safety payoff is another matter: NHTSA says it cannot yet estimate the marker-lamp proposal’s potential safety benefits.

Federal Register publication is scheduled for October 26, 2026. The comment window runs for 30 days after publication, not from the October 23 announcement.