FMCSA Clears Cab Beacons for Driverless Trucks Through 2031

FMCSA issues five-year beacon exemption

The Federal Motor Carrier Safety Administration has given qualifying Level 4 automated commercial trucks a new, long-term option for warning other road users when they stop on a highway or shoulder.

Effective **October 7, 2026**, FMCSA granted Aurora Operations and other eligible motor carriers operating Level 4 automated-driving-system trucks an exemption that permits specified cab-mounted flashing warning beacons in place of the roadside warning devices otherwise required by federal rules. The exemption runs through **October 7, 2031**. The agency’s decision was published in the *Federal Register* on October 9. ([fmcsa.dot.gov](https://www.fmcsa.dot.gov/safety/carrier-safety/grant-application-exemption-aurora-operations-inc))

The decision matters because a truck operating without a human driver cannot send someone outside to set reflective triangles or fusees around a disabled vehicle. It also gives autonomous-truck developers and their carrier customers a defined federal pathway rather than relying on short-term waivers.

For conventional CDL drivers and fleets, the bottom line is just as important: this is a limited exemption for qualifying Level 4 automated trucks. It does **not** replace the normal stopped-vehicle warning-device requirements for conventional commercial trucks.

What the exemption changes

Under the usual federal rules, a stopped commercial motor vehicle must use hazard warning flashers and, in many situations, have warning devices placed around the vehicle. The required equipment includes three bidirectional reflective triangles or at least six fusees. Drivers generally have up to 10 minutes to place those devices after stopping. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

Under the new exemption, covered Level 4 trucks can use a defined set of cab-mounted warning beacons instead of those traditional roadside devices. The exemption covers relief from the warning-device placement rule, the requirement that certain lamps be steady-burning, and the rule governing the type and number of warning devices carried. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

FMCSA’s decision applies first to Aurora. It can also apply to another motor carrier operating Level 4 automated-driving-system-equipped commercial vehicles, but that carrier must notify FMCSA in writing before beginning operations under the exemption. The notification must identify the carrier, its USDOT number, its contact information, and its ability and commitment to meet every condition of the exemption. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

That distinction is significant. This is not a blanket rule change for every truck, every carrier, or every vehicle equipped with driver-assistance technology. It is a conditional exemption for a specific class of Level 4 automated operations.

The safety conditions are detailed

FMCSA attached operational and equipment requirements intended to make the beacons a substitute for traditional warning triangles in the limited situations covered by the exemption.

Among the main conditions:

• Beacons must include forward- and rearward-facing flashing lights.
• A truck must have at least one rearward-facing light on each side of the cab and at least one forward-facing light on the front of the cab.
• The lights must be mounted at least 100 inches above the ground, at or above the upper edge of the side mirrors and below the top edge of the cab.
• The beacons must be amber and meet SAE J595 Class 1 photometric-performance requirements.
• The beacon system must use redundant power sources to avoid a single-point power failure.
• The beacons must activate as soon as possible, and no later than five minutes after a truck stops on a traveled roadway or shoulder in circumstances where the warning-device rule would normally apply.
• Standard hazard flashers must remain on throughout the stop as well.

The trucks also may operate under the exemption only on roadways within the vehicle’s validated operational design domain, or ODD. In plain terms, the beacon option is tied to the specific roads, geography, and operating conditions for which that automated truck system has been designed and validated. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

Some operations remain off-limits

The exemption does not open every freight segment to beacon-equipped automated trucks.

FMCSA prohibits its use when the operation would require an H, X, P, or S CDL endorsement if a human driver were present. That means the exemption cannot be used for covered operations involving hazardous materials, passengers, tank vehicles requiring an N endorsement are not automatically barred, but the specific endorsement and operating restrictions still matter. The exemption also prohibits for-hire and private passenger operations. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

Longer-combination-vehicle use is restricted as well. The exemption permits only doubles made up of two 28-foot trailers; it does not allow triples. FMCSA says tankers may operate under the exemption, subject to its conditions and monitoring requirements. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

Why FMCSA approved it now

This is not the first time Aurora and the agency have dealt with the warning-device question. FMCSA denied a broader exemption request in late 2024, citing concerns that the earlier request lacked enough specificity about carriers, equipment, vehicles, and safety controls.

The newer exemption includes defined beacon specifications, advance notification requirements for other carriers, redundant-power requirements, operational limits, crash reporting, and annual reporting. FMCSA said those added controls addressed shortcomings identified in the earlier denial. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

FMCSA also cited data submitted from previous waiver operations. The agency said Aurora reported more than 500,000 miles of operation under a prior waiver, nearly 10 hours of successful beacon deployment, and no roadway collisions involving its stopped trucks while the beacons were in use. Those results, together with research submitted with the application and the new operating limits, led FMCSA to conclude the exemption would likely provide an equivalent or greater level of safety than the rules it replaces for covered vehicles. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

The decision was not without opposition. FMCSA received 402 comments. Some safety advocates, owner-operator groups, and drivers raised concerns about whether a trailer, hill, curve, weather condition, or power problem could limit the visibility or effectiveness of cab-mounted lights. Some commenters also argued that the limited amount of real-world beacon-use time did not justify a five-year exemption. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

FMCSA responded by pointing to the requirement for redundant power, constant hazard flashers, the five-minute activation deadline, annual reporting, crash reporting, and the limit to validated operating domains. The agency can revoke the exemption for a particular carrier or all covered carriers if operators fail to follow its terms, safety deteriorates, or the exemption no longer serves federal safety goals. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))

What CDL drivers should know

For drivers operating conventional trucks, the practical rule remains unchanged: continue following the standard federal requirements for hazard flashers and emergency warning devices when your truck is stopped where the rules apply.

A cab-mounted amber beacon on an automated truck should not be treated as a signal that conventional equipment rules have changed for all drivers. This exemption is narrow, vehicle-specific, and dependent on the carrier meeting the listed conditions.

Drivers sharing the road with automated trucks may see additional high-mounted amber lights during a stopped-vehicle event. The safest response remains the same as with any disabled commercial vehicle: reduce speed, increase following distance, move over when it is safe and lawful, and watch for emergency personnel, recovery vehicles, or traffic-control activity.

What carriers, recruiters, and compliance teams should watch

For traditional fleets, this development does not create a new option to remove triangles or fusees from standard trucks. Fleet maintenance, safety, and roadside-inspection procedures should remain aligned with the ordinary federal equipment rules unless a carrier is specifically operating a covered Level 4 vehicle under the exemption.

For automated-truck carriers and their compliance teams, the key obligations include:

• Providing FMCSA written notification before using the exemption, unless the carrier is Aurora.
• Confirming beacon placement, brightness, flash pattern, activation timing, and redundant-power compliance.
• Limiting operations to the truck’s validated ODD.
• Reporting covered crashes to FMCSA within five calendar days.
• Filing annual reports by November 1 with vehicle counts, mileage, beacon malfunctions or power issues, and configuration details.

Recruiters and staffing teams should also be precise when discussing autonomous freight jobs. The exemption concerns the warning system used by qualifying automated trucks; it does not eliminate the many roles needed for dispatch, maintenance, remote support, recovery coordination, terminal work, safety management, and freight operations.

What to watch next

The first annual reports under the exemption could provide a clearer picture of how often covered trucks stop on shoulders or roadways, how beacon systems perform, and whether FMCSA sees recurring technical or operational issues.

The decision may also influence a broader policy discussion. FMCSA noted that updating warning-device requirements for conventional commercial vehicles could be appropriate for future regulatory consideration. That is not a rule change today, but it signals that the agency may continue examining whether newer conspicuity technology can improve roadside safety beyond automated trucking. ([govinfo.gov](https://www.govinfo.gov/content/pkg/FR-2026-10-09/html/2026-20734.htm))