The RADAR™ Single Eye EP-PD Spray System is a photoelectric sensor-activated, asphalt release applicator that mounts to a user-supplied drive-though arch for spraying asphalt truck beds. This system uses an electric pump to draw ready-to-use chemical solution from a user-supplied tank. When a truck comes into range of the single-eye, diffuse-reflective photoelectric sensor, a delay timer allows the driver to position the truck under the spray nozzle before spraying begins and a run timer applies release agent for a pre-set time or until the vehicle leaves the spraying area, whichever is first.