Abstract: An improved, self-contained, obstacle detector assembly and alert system consisting of a weather resistant housing unit, a proximity probe frictionally attached to the front end of a rod positioned within a rod guide. Inside the detector assembly housing, the rod is connected to return spring, electrical switching mechanism, battery pack, and alarm system. When the impact probe encounters an obstacle, the rod is pushed into the housing and depresses a mechanical switching lever that contacts the ground plan effectively closing an electrical circuit activating the alarm thus alerting the operator that an obstacle has been encountered. The primary objective of the invention is to provide an improved obstacle detector and alarm system that ALERTS the operator of modern motor vehicles of the immediate proximity of a curb, parking block, roof overhang, or similar impediment prior to impact.