The Federal Motor Carrier Safety Administration (FMCSA) in the United States has granted permission to Aurora Operations and other operators meeting specific criteria to use amber beacons mounted on the cab in place of traditional emergency reflective triangles for certain trucks equipped with Level 4 automated driving systems. This ruling does not extend to standard trucks.
The exemption was announced in the Federal Register on October 9, 2026, but has been effective since October 7, 2026, and will remain in place until October 7, 2031. Details of the decision can be found in FMCSA document 2026-20734, under docket FMCSA-2026-0958.
Eligibility for the Exemption
This authorization applies to commercial vehicles operated by Aurora that are equipped with Level 4 automation, as well as those from other companies with equivalent vehicles that notify the FMCSA in writing about their intention to utilize the exemption and demonstrate compliance with its conditions.
Level 4 automation allows the vehicle to handle driving within a defined operational domain. Consequently, the permission to use beacons is restricted to each vehicle's validated operational area and does not permit unrestricted autonomous travel across the United States.
The beacons must flash amber light both forward and backward from designated mounting points on the cab, meet specific brightness requirements, and have redundant power sources. They should be activated as soon as possible, and no later than five minutes, when signaling a stop on the roadway or shoulder. The beacons are required to remain on during the stop and operate in conjunction with emergency hazard lights.
The waiver does not allow for the transport of passengers or hazardous materials. Additionally, operators utilizing the exemption must submit annual reports and notify the FMCSA within five days of certain accidents involving situations where the beacons were or should have been activated.
Concerns from Truckers and Safety Groups
The Owner-Operator Independent Drivers Association (OOIDA) opposed the request, arguing that the evidence presented did not adequately reflect the wide range of weather, lighting, traffic, and road conditions. Other groups raised concerns about potential visibility issues on curves or hills and when the trailer's position might block the lights.
However, the FMCSA determined that Aurora's prior studies and test data, combined with the newly established requirements and controls, ensure a level of safety that is equivalent to or greater than traditional devices. The agency also emphasized that the system eliminates the need for drivers to exit the vehicle and place triangles in traffic.
Understanding the FMCSA's Decision on Autonomous Truck Safety
What is the duration of the FMCSA's exemption for using beacons?
The exemption is effective from October 7, 2026, and will last until October 7, 2031.
Who can utilize this exemption for autonomous trucks?
Operators like Aurora with Level 4 automated vehicles, and other companies with equivalent systems that notify the FMCSA and meet the exemption conditions, are eligible.
What are the requirements for the beacons used on these trucks?
The beacons must flash amber lights in both directions, meet specific brightness criteria, have redundant power, and be used with emergency hazard lights during stops.