Abstract: A light signal system for a motor vehicle which utilizes the emergency flashing light system which is incorporated within a motor vehicle which is then to be visually observed by other motorists located rearward of the motor vehicle. Normal braking action will not cause actuation of the light signal system. Upon the braking force exceeding a predetermined level, the conventional brake light system of the motor vehicle will be changed into a flashing mode to make it more apparent to following motorists that a potentially dangerous situation is occurring. Actuation of the light signal system is to be made independent of vehicle inclination from horizontal either due to road gradient or suspension non-uniformly.