Abstract: Traditional Hough transform has large amount of calculation, is poor realtime, and easily influenced by image noise, so the road detection using it cannot achieve good effect. Consequently, an improved algorithm for road detection based on Hough transform was presented. Based on the analysis of the actual road shape modeling, the algorithm can effectively remove the error message of actual road with / without signs or any other interfering factors, and can achieve better effect of road detection within 200 ms.