城市,一个地区政治、经济、文化的中心,街道、车龙、人流构成了它独特的景观。随着城市经济的迅速发展和整体文明程度的提高,城市的交通环境显得越来越重要,畅通有序、方便快捷已成为人们对城市交通的期望和要求。然而,当“人、车、路”三者的矛盾日益凸显的时候,当城市的交通 City, a regional political, economic and cultural center, the streets, the car, the flow of people constitutes its unique landscape. With the rapid development of urban economy and the improvement of the overall civilization level, the traffic environment of the city is becoming more and more important. The smooth and orderly and convenient operation has become the expectation and requirement of urban traffic. However, when the contradiction between “people, cars and roads” has become increasingly prominent, when the traffic of the city