US Patent 7258461 Vehicle barrier with light

A vehicle barrier arranged for moving from a first position that permits a vehicle to move past the vehicle barrier to a second position that prevents a vehicle from moving past the vehicle barrier, and a light mounted on the vehicle barrier that moves with the vehicle barrier, wherein when the vehicle is in the first position the light is illuminated in a first color (e.g., green) and in the second position the light is illuminated in a second color (e.g., red).