FMCSA Seeks Comments on Metronet Pulsating Brake Lamp Exemption

Metronet has asked FMCSA for a 5-year exemption from 49 CFR 393.25(e). That rule requires exterior lamps to be steady burning, except for certain lamps listed in the regulation.

The exemption would let Metronet use Grote's amber brake-activated pulsating lamp on its trailers, pickup truck service vehicles, and van body straight trucks. The lamp would be added to the steady-burning brake lamps already required by the FMCSRs.

When the brakes are applied, Metronet says the lamp would operate as a Class II strobe for up to 4 seconds. It would then illuminate with a steady-burning red light for the rest of the time the brake circuit is activated.

FMCSA already granted Grote an exemption for the lamp on trailers and van body straight trucks. That exemption expires on December 2, 2030. Metronet's request adds pickup truck service vehicles, which are not covered by the Grote exemption.

Metronet says rear-end collisions made up 19 percent of its reportable crashes in 2025. It says the lamp could improve visibility and reduce rear-end crash risk.

FMCSA is asking for public comment on the application. Comments must be received on or before December 4, 2026, and should be identified by Docket No. FMCSA-2026-2707.

Source: Federal Register — https://www.federalregister.gov/documents/2026/11/04/2026-22512/parts-and-accessories-necessary-for-safe-operation-metronet-application-for-exemption