Collision Avoidance Systems Act of 2025

This bill updates federal vehicle safety standards to permit pulsating light systems on high-mounted stop lamps, directly affecting vehicle manufacturers and safety regulators. It requires the Transportation Secretary to issue new regulations within 180 days establishing performance rules for these systems. The key provision defines a "pulsating light system" as one that emits rapid pulses (max 4 pulses within 1.2 seconds) when brakes are applied, then switches to steady light, with a mandatory 5-second lockout period before pulses can repeat after brake release. The bill amends Federal Motor Vehicle Safety Standard 108 to formally allow this technology under specific technical parameters.