With the development of city and improvement of road infrastructure, urban elevated road becomes the important way of interurbantraffic.
随着城市的飞速发展和道路基础设施的改善，建设城市高架道路已成为国内外城市解决城市交通的重要手段。
2
The characteristics of different traffic models that exist in the incity and interurbantraffic systems respectively are researched and the calculation models of urban traffic demand are put forward.