Effects of Speed Management Facilities and Suggestions

Speed management has been demonstrated to enhance the overall safety of the road system. Setting appropriate speed management facilities (such as posted speed limit, automated speed enforcement systems, etc.) would be highly effective in reducing illegal speeding behavior and enhancing transportation efficiency. The purpose of this paper is to evaluate the effects of posted speed limit signs and automated speed camera enforcement systems and to make suggestions for highway design practitioners and policy makers. A speed increment analysis method is used to discuss samples with posted speed limits ranging from 40km/h to 80km/h or automated speed camera enforcement systems. The ratio of drivers complying with the limit speeds or not was also observed or investigated by questionnaires. Conclusions and constructive suggestions for posting speed limit signs or automated speed camera enforcement systems are put forward in this paper.