The vehicle signalization retrofit kit according to the present invention comprises a limit switch assembly wherein a pair of limit switches are pre-wired with a colour coded wiring system and connectors, and are adjustably affixed to a post that is easily mountable by bonding to the firewall of a vehicle, between the brake pedal and the accelerator pedal. The wiring system has a connection to the battery of the vehicle such that no interference with the wiring system or the fuse box of the vehicle is required. The retrofit kit also has a pair of light modules each having colored lights of red, amber and green colours. One light module is mountable to the front end of the vehicle and the other is mountable to the rear end of the vehicle for communicating to nearby drivers and pedestrians various operating conditions of the vehicle, such as braking, decelerating and accelerating.