| S4 Hujin Expressway | |
|---|---|
| Major junctions | |
| North end: | Interchange with S20 Outer Ring Expressway, Humin Elevated Road, and G60 Shanghai–Kunming Expressway, Minhang District |
| S32 Shenjiahu Expressway G1501 Shanghai Ring Expressway |
|
| South end: | G15 Shenhai Expressway, Jinshan District |
| Highway system | |
Hujin Expressway (Chinese: 沪金高速公路), designated S4, is an expressway in Shanghai. It runs generally in a north-south direction from the Xinzhuang Interchange, a large interchange with the S20 Outer Ring Expressway, Humin Elevated Road, and the G60 Shanghai–Kunming Expressway in Minhang District to Jinshan District, ending at an interchange with the G15 Shenhai Expressway. The expressway is tolled south of Jindu Road.
Before August 2009, the expressway was known as the A4 Expressway[1].