? (1) background: industrial revolution; Rapid urban development (accelerating urbanization and the emergence of industrial cities); Urban traffic conditions are becoming more and more complicated (the number and types of vehicles are increasing).

(2) the invention and application of internal combustion engine, and the emergence of new means of transportation; The invention of electric light and the wide application of electricity; The emergence and popularization of computer technology; The appearance and application of network technology.

(3) It has solved the increasingly prominent traffic problems in the process of urbanization and improved the urban living environment; Promote the process of urbanization and improve the level of urban management; Improve the level of urban civilization (sense of responsibility, legal concept, behavior)