The classification of urban roads by function is based on the relationship between roads and urban land use, and the function of the roads is determined by the nature of the traffic generated by the land on both sides of the road. Urban roads can be divided into two categories according to their functions.
(1) Traffic roads . Traffic roads are the main functions to meet the requirements of transportation. They bear the main traffic flow of the city and the connection with external traffic. The characteristics are that the speed is large, the vehicles are large, the roadway is wide, and the road line type is in line with fast driving. It is required that both sides of the road be required to avoid the arrangement of public buildings that attract large numbers of people.
Depending on the nature of the traffic, It can be divided into: freight-oriented main roads are mainly distributed in the periphery of cities and industrial areas, and near the external freight transportation hub; passenger-oriented traffic trunks are mainly arranged in the main flow of urban passenger flow; mixed traffic roads between passengers and goods are between traffic trunks. A distributive or liaison road, or a location where the nature of the land is mixed.
(2) The road to life . The life path is the main function to meet the urban life traffic requirements. It mainly serves urban residents in shopping, socializing, recreation and other activities. It is mainly based on walking and bicycle transportation. There are fewer motor vehicles and more roads are arranged on both sides of the road. Sexual and dry roads.
In addition to the above two categories Urban roads can also be divided into two categories: dredge roads (traffic trunk roads for dredging traffic) and service roads (those roads for various types of urban land use services).