Abstract: A vehicle mounted sensor system for detecting the presence of objects and individuals adjacent a vehicle such as a commuter bus includes at least four motion detectors mounted to the front, back and both sides of the vehicle, an electrical control box for receiving and interpreting signals generated by the motion detectors, and a display and control panel having indicator lamps that light in response to one or more of motion detectors being triggered by the presence of an individual within the preset detection range. The control panel also includes a tone or alarm that will also sound in response to the detection of the presence of an individual.