In the paper,a road edge identification algorithm is developed .The new idea of this method is touse natural road edge ,as well as the whites trip for road information acquisition .Then atural roade dge will notbee as ilypolluted like the white lane maker do ,soitindicates bettera daptability .Inthealgorithm ,weuseboth the pixelfeature and the framefeaturetoidentify theroadedge ,which is referred to as the global road model.Be cause several road constrainsisused toensure the roadedgede tection ,the alg...