Aurora, one of the major players in autonomous trucking, says the U.S. Department of Transportation has now approved its request to use cab-mounted warning beacons instead of traditional reflective triangles on its driverless trucks. This announcement comes about a year after the Federal Motor Carrier Safety Administration denied a similar request, which led Aurora to file a lawsuit claiming the agency’s decision was blocking progress in autonomous trucking. With this approval, Aurora says it plans to drop the lawsuit.
In its October 9 statement, Aurora said the DOT’s decision allows the company to move forward with flashing beacons mounted on the cab to alert other drivers when a truck is stopped on the shoulder. According to the company, the beacons function similarly to the warning lights used by construction and emergency vehicles and are intended to serve the same purpose as reflective triangles in breakdown situations. FMCSA has not yet posted the exemption in the Federal Register or commented publicly.
Under current federal rules, truck drivers must place three warning devices on the road when stopped on the shoulder. The first must be positioned about 10 feet from the vehicle on the traffic side. The second must be placed roughly 100 feet behind the truck in the lane or on the shoulder in the direction of approaching traffic. The third must be set about 100 feet ahead of the truck in the same lane or shoulder, facing away from approaching traffic. Since autonomous trucks are designed to operate without a driver onboard, physically placing these triangles is not possible. For that reason, Aurora and Waymo filed requests last year for an exemption that would allow the use of cab-mounted warning lights in place of traditional devices.
FMCSA denied that request in December 2024, stating it was too broad and didn’t include the necessary oversight to guarantee safety. The Owner-Operator Independent Drivers Association opposed the exemption at the time and raised concerns that the warning beacons would not be effective in certain conditions, such as when a truck is parked within 500 feet of a curve. OOIDA pointed out that reflective triangles and flares don’t depend on truck electronics and continue to work when technology fails. The group also questioned how these autonomous systems would handle situations where the beacons themselves malfunction or lose power.
Aurora has continued to expand its driverless testing, even as it navigates regulatory hurdles. In April, the company began operating vehicles without a driver behind the wheel on Interstate 45 between Dallas and Houston. At first, some test runs had someone seated in the back or no one on board at all. By mid-May, Aurora added a human driver back into the front seat after a request from its partner, Paccar. Since then, the company has extended routes to Phoenix, Fort Worth, and El Paso.
Aurora is not the only one pushing for rule changes. In August, Emergency Safety Solutions asked FMCSA for a five-year exemption from the same triangle placement requirement so it could use its own warning light technology in breakdown situations. OOIDA opposed this request as well, and FMCSA has not yet issued a decision. The public comment period ended in late September.
For now, Aurora’s approval from the DOT marks a major step in how autonomous trucking companies may handle roadside emergencies without a driver present. Truck drivers across the industry will be watching closely to see how federal regulators address safety concerns and whether exemptions like this become more common as more driverless trucks enter the highways.
Source: Land Line Media
