Abstract: Most of the big and medium-sized cities in China are generally located on both sides of rivers or the major parts of some cities are on one side. In order to connect the traffic of each side or to link up the through traffic, it is necessary to build large urban road-highway bridges which are in the dual nature of both urban bridges and highway bridges. Based on analysing the basic features of approach layout of urban road-highway bridge, this paper discusses the influence of approach layout on city planning and the operation of bridges. It can serve as a reference for the design of this kind of bridges.