A novel on-road vehicle detection approach with monocular camera is presented which fuses multi-cues of object.First,the horizontal symmtery of vehicle rear view is utilized to achieve the region of interest so as to reduce the search area of following process.And then,the sign of underneath shadow is employed to generate hypothetical positions on which potential vehicles maybe present.Finally,both image intensity and figure information are combined to verify the vertical symmetry of the potential vehicle c...