RFID is non-contact automatic identification technology which could be applied to various industries extensively. Accessing the vehicle speed range in freeway, we could use RFID technology to monitor speed of vehicles. Then we could determine whether the vehicles are over speed. Therefore, the use of RFID technology can effectively reduce speeding violations and enhance traffic safety. Its toll ... [Show full abstract] is paid by credit card automatically through computer network. Therefore, realize the non-stop automatic toll collection. Contrarily, punish the illegal vehicle by monitor network.