Patent ID: 7190283

Claim:
A method for warning a driver of a vehicle on a first road of an approaching vehicle on a second road as the approaching vehicle approaches a common intersection of the first and second roads, wherein the approaching vehicle is approaching the intersection from a blind spot, said method comprising the steps of: providing a housing having a peripheral wall and a top wall, said housing being mounted adjacent to said intersection; positioning said housing to provide a clear line of sight between the housing and the blind spot and the housing and the first road; providing a motion detector being mounted on said peripheral wall and being directed toward said blind spot; providing a light emitter being mounted on said peripheral wall and being directed toward said first road, said light emitter being electrically coupled to said motion detector; turning on said light emitter by said motion detector when motion is detected in said blind spot; and providing a power supply, said power supply being electrically coupled to said motion detector.