Abstract: | The traffic safety, traffic jam and environmental pollution are three hang-ups which puzzled present international traffic realm, and among them the traffic safety is the worst. According to research by experts, after improving roads management level by application of intelligent traffic technology, the death rate in traffic accidents each year can be cut down by 30% above, and improved usage rate of traffic tool by 50% above. Therefor, all development countries in the world have contest in doing large scale research & experiment on intelligent traffic technologies. |