1. A system for monitoring selected road sections and for detecting the occurrence of obstacles that occupy said selected road sections, said system comprising: a road section imaging device for generating image data of a selected road section being monitored, said image data including reference image data of said selected road section having no obstacles and monitored image data of said selected road section when obstacles may be present; an image processing device communicatively connected to receive said image data from said road section imaging device, said image processing device including means for detecting an obstacle based on detecting a frame difference between said reference image data and monitored image data; means connected to said image processing device, for measuring physical dimensions of said detected obstacle and for generating an output signal when said physical dimensions of said obstacle exceed predetermined minimum physical dimension data; and means communicatively connected to receive said output signal from said measuring means, for generating a warning display of said detected obstacle.