Driverless Truck Warning-Beacon Exemption
The Federal Motor Carrier Safety Administration has made it official: driverless trucks get to skip the warning triangles — under strict conditions.
What changed
A Federal Register notice published October 9, 2026 grants Aurora Operations, Inc. and other qualifying motor carriers operating Level 4 automated-driving-system-equipped commercial motor vehicles a limited five-year exemption from three federal warning-device rules: 49 CFR 392.22(b) (placing warning devices around a stopped CMV), 49 CFR 393.25(e) (steady-burning exterior lamps), and 49 CFR 393.95(f) (types and number of warning devices).
The exemption is effective October 7, 2026 and runs through October 7, 2031. It is not Aurora-only: any other motor carrier running Level 4 ADS-equipped CMVs may operate under it, provided the carrier notifies FMCSA in writing before starting and complies with all conditions.
The problem it solves is practical: the rules require a driver to get out and place reflective triangles around a stopped truck as soon as possible, within 10 minutes. A Level 4 truck has no driver to do that, so FMCSA is allowing high-mounted cab beacons to substitute.
The conditions are the real story
The beacons must be flashing amber lights meeting SAE J595 class 1 photometric performance, mounted high on each side of the cab, with redundant power.
They must be activated as soon as possible — no later than five minutes after stopping — and stay on for the duration of the stop, along with the hazard flashers.
The exemption applies only within each vehicle's validated operational design domain. It is not a blanket license for driverless trucks everywhere.
Exempted operations may not carry passengers or hazardous materials — any operation that would require an H, X, P, or S endorsement is excluded.
Carriers must file annual reports detailing malfunctions, power issues, or any time the beacons failed to operate as required, and report certain crashes to FMCSA within five days.
FMCSA says the beacon system is likely to achieve safety equivalent to or greater than triangles, citing Aurora's waiver-period data: 34 vehicles, over 500,000 miles, with no beacon faults or malfunctions reported. OOIDA and other driver groups objected, questioning whether beacons alert approaching motorists as effectively as triangles. Separately, the 7th Circuit Court of Appeals denied a cargo-van operator's request for an immediate stay of FMCSA's earlier waiver orders on October 5.
What it means for your fleet
If you run conventional trucks, nothing changes: your drivers must still place warning triangles per §392.22, within 10 minutes of stopping, at the prescribed positions. Do not confuse this exemption with relief for human-driven equipment.
If you operate — or plan to operate — Level 4 autonomous CMVs, the path is opt-in with paperwork: written notice to FMCSA first, beacons built to spec, annual reporting, and crash notification duties. The exemption is broad in time (five years) but narrow in scope.
Source: Federal Register — "Parts and Accessories Necessary for Safe Operation; Application for Exemption From Aurora Operations, Inc (USDOT #341156)" (notice of final disposition; grant of exemption), published Oct. 9, 2026:
https://www.federalregister.gov/documents/2026/10/09/2026-20734/parts-and-accessories-necessary-for-safe-operation-application-for-exemption-from-aurora-operations
Desert Fleet Solutions provides compliance information for educational purposes. This post is not legal advice.