Abstract:Urban expressway interchange is not only the key to realize rapid traffic conversion, but also a difficult problem in expressway planning and design. This paper summarizes common forms of expressway interchange. By analyzing the advantages and disadvantages of each interchange form, the scope of application is analyzed, and the applicability of different forms of interchange is summarized. Analyze the steps of interchange planning and design to explore the general method of expressway interchange design. Finally, take Nanchang Jiuzhou Expressway as an example to analysis and verification.