1. A method for validating a candidate region, for use in an automobile lane-detection system, identified within a latest road image of a temporal sequence of road images captured from the front of a vehicle traveling along a road, as including an image of a lane marker on the road, the method comprising the steps of: when no previously-verified region and no previously-rejected region aligns with the candidate region: determining a minimum distance between the candidate region and a previously-verified region of a previously-captured road image of the sequence; when the minimum distance exceeds a threshold distance, storing the candidate region as a verified region; and when the minimum distance is less than the threshold distance, storing the candidate region as a rejected region.