How long is the Donghai Bridge from Luchao Port in Nanhui, Shanghai to Xiaoyangshan?

The sea bridge is about 3 1km long, designed according to the standard of two-way six-lane expressway, with a width of 3 1.5m and a designed driving speed of 80 km. In order to facilitate the navigation of ships, the navigation standard of the bridge is 5000-ton, with 5000-ton main navigation holes with a clear navigation height of 40 meters, and 1000-ton auxiliary navigation holes, 500-ton auxiliary navigation holes and two auxiliary navigation holes. The main navigation span bridge is a cable-stayed bridge with twin towers and single cable plane combined with box girder.