Reference

LED flare kits are widely sold as DOT approved, and they are not. This guide gives the FMVSS No. 125 construction specification a triangle must actually meet, the 49 CFR 392.22 placement geometry for two-lane and divided highways, and the FMCSA exemption record that explains where the claim comes from and why it does not generalise.

FMCSA amended 393.95 twice in 2026, both times by deletion: liquid-burning flares ceased to be an accepted warning device in March, and the spare-fuse requirement was removed in April. This guide gives what the section still requires, the extinguisher ratings and condition rules, and the 392.22 placement patterns for every road type.