Abstract:Most of city expressway projects includes the characteristics of large scale, multiple majors, and complex internal and external technical interfaces. The designing work should fully integrate the characteristics of the needs of various professional projects, and systematically formulate the overall design plan. This article introduces the engineering background and construction conditions of Haishan Avenue (Dongwei 1st Road-Jiangjin Street), and the conceptual research process of the overall design scheme. The discussion focused on the coordination of various professional projects, the overall plan of interchange, the integrated design of vertical and horizontal sections. Some engineering experience has been summed up through this project, hoping to provide reference for similar projects.