According to a report by Reuters on October 8th, the U.S. Department of Transportation has approved autonomous Aurora and other autonomous truck companies for a five-year exemption from safety regulations. This allows these trucks to use high-visibility warning lights installed in the cab when they are not in operation, replacing the current requirement that drivers must place reflective warning triangles around the vehicle.
Peterbilt 579 trucks equipped with Aurora autonomous driving system, Reuters
This decision is seen as an important step towards the commercialization of autonomous trucks in the United States. Under current regulations, when trucks stop on the road, drivers must place reflective warning devices around the vehicle to alert other road users. However, it is not practical for autonomous trucks without drivers to remove personnel from the vehicle to set up these warning devices after stopping.
Therefore, how to meet road safety requirements without relying on manual operations has become one of the issues that need to be addressed for the large-scale operation of autonomous trucking.
The U.S. Department of Transportation states that the warning lights installed in the cab can achieve a safety level comparable to or higher than current regulations. Companies that receive exemptions still need to comply with relevant regulatory requirements, including notifying the U.S. Federal Highway Safety Administration in advance and reporting any collisions that occur while the warning lights are on or should be on. If the arrangements result in a decrease in safety levels, regulators have the authority to revoke the exemption.
It is worth mentioning that in 2023, Waymo, the autonomous vehicle division of Google's parent company Alphabet, and Aurora jointly applied for relevant exemptions. In early 2025, Aurora also sued the U.S. Federal Motor Transport Security Administration due to delayed regulatory approvals. Subsequently, the U.S. Department of Transportation granted temporary exemptions in October 2025, with extensions made several times. This approval will now officially extend the temporary exemption for five years.
Public data shows that Aurora currently has approximately 20 autonomous trucks on the road. The company states that the new high-visibility warning lights on the vehicles can alert other road users in a timely manner, without putting people at risk on the road.
From the perspective of industry development, this exemption addresses a specific compliance issue in the operation of autonomous trucks, rather than a comprehensive relaxation of safety regulations. As autonomous commercial vehicles gradually move from testing to regular operations, how the rules established for manual-driven vehicles can be adapted to vehicles without drivers will become an issue that regulatory authorities need to continue to address.
The United States has adopted alternative technologies to meet existing safety requirements, providing a clearer policy framework for the commercial operation of autonomous trucks. However, whether this exemption can lead to larger-scale operations still depends on whether companies can continuously demonstrate the safety of the technology, and how regulatory authorities assess the risks based on actual accidents and operational data.
