The Federal Motor Carrier Safety Administration (FMCSA) granted the exemption this week, allowing autonomous truck operators to use cab-mounted warning beacons instead of the reflective triangles that federal rules require human drivers to physically place on the roadway within 10 minutes of stopping.
That requirement posed an obvious problem for driverless trucks: if a mechanical issue forces the vehicle to pull over, there is no human onboard to deploy the warning devices. The issue was significant enough that Aurora took federal safety regulators to court over it. After a court denied the company's request for an exemption, Aurora escalated the fight to the District of Columbia Court of Appeals, and trucking companies operated under a temporary waiver while the case was pending.
The new five-year exemption applies to Aurora and Kodiak AI, and clears the way for them to replace roadside warning devices with cab-mounted beacons. Aurora has published guidance for first responders explaining how its warning system works.
The decision removes one of the practical obstacles to commercializing self-driving trucks, which must comply with safety rules written for vehicles with human drivers. It remains one of several regulatory questions the industry must resolve as it moves toward driverless freight operations on US roads.