A system which alerts vehicle drivers to avoid intersection vehicle collision, the system comprises of a plurality of vehicles containing a vehicle mount or portable collision avoidance device, equipped with a GPS receiver for providing vehicle location, vehicle travel direction, vehicle speed, vehicle distance from an intersection location to the vehicle collision avoidance device processor, and an RF transceiver for receiving plurality of intersection location traffic signal lights condition information from a broadcasting station, which includes at least one traffic light condition signal at acquisition time. The processor compares the received vehicle GPS location information, with vehicle travel direction, vehicle distance from the intersection, vehicle speed and received broadcasted signal light condition information, and accordingly generates a first warning alarm signal to warn the driver of not being in compliance with the traffic light condition, if the driver becomes none responsive, the collision avoidance device transmits a secondary warring alarm signal(s) to other vehicle drivers indicating the presence of an intersection vehicle collision condition.