The ShanghaiâÂÂNanjing Expressway () is the main expressway between the Chinese cities of Shanghai and Nanjing. It is also the busiest expressway in China. The expressway began construction on June 14, 1992, was completed in February 1996, and opened to traffic November 28, 1996. That year, it was listed as a key national construction project.
As the first highway in Jiangsu province, the ShanghaiâÂÂNanjing Expressway has up-to-date charge, monitoring, communications, lighting, safety and service facilities. It has improved transportation in Jiangsu and Shanghai, and encourages development along its length. It was the first expressway in China to use remote traffic monitoring.
The expressway is a modern, enclosed, four-lane, two-way highway. Each lane is wide, and the highway's roadbed is wide. There is a dividing strip in the center of the highway and a emergency parking area on each side of the highway. The speed limit is . It is in length. It runs from Zhenru, Shanghai to Maqun, Nanjing via Anting, Kunshan, Suzhou, Shuofang (), Wuxi, Changzhou, Danyang, Zhenjiang and Jurong. The Shanghai section is in length, and the Jiangsu section is long. The Zhenjiang section (a branch highway) is long. In Shanghai, the highway is coterminous with G2 BeijingâÂÂShanghai Expressway and G42 ShanghaiâÂÂChengdu Expressway.