Xiping-Siwan section of Sanmenxia-Xichuan expressway is connected to Lushi-Xiping section of Sanmenxia-Xichuan expressway in the north, and the end is located at Qieguyu, Siwan Town, Xichuan County. There are 34 great bridges of 10733.5m and 4 medium bridges of 306.84m. There are 4 long tunnels of 4932.5m, 2 middle tunnels of 1036m, 2 short tunnels of 439.5m and 3 interchanges. The design speed is 80km / h and the total length is 37.5km. Sanmenxia-Xichuan expressway is an important part of "seven vertical and nineteen horizontal" layout of expressway network in Central China. Together with the three national expressways of Lianhuo, Hushan and Fuyin, it forms a regional transportation framework system in the central region, forming energy transportation and tourism channels in western Henan, southwest Henan and northwest Hubei, which plays a huge role in promoting the sound, rapid and sustainable development of economy.

Taking "let people enjoy the journey better" as the mission, following the design guiding ideology of "suit measures to local conditions, pragmatic and appropriate, natural and harmonious, green and low carbon, keep improving", the project will be built into a "energy saving, resource saving, environment-friendly, smooth and durable" expressway. At the same time, as one of the six low-carbon highway demonstration projects in China, the low-carbon design concept, measures and experience after the completion of the project will also be a positive promotion and promotion for China's expressway energy conservation and emission reduction, the realization of green low-carbon highway popularization, and the promotion of China's energy conservation and low-carbon construction.