Woronora River Bridge, Road bridge in Woronora, Sydney, Australia

The Woronora River Bridge is a four-lane road bridge carrying River Road across the Woronora River at Woronora, in southern Sydney. Completed in 2001, it was built as an incrementally launched concrete structure with horizontal and vertical curves, replacing the steep grades and hairpin bends of the earlier route between Sutherland and Bangor. A shared pedestrian and cycleway runs just beneath the road on the northern side.

The Woronora River Bridge opened in 2001, replacing a two-lane low-level bridge from 1981, which had in turn replaced a single-lane timber bridge from 1912. The new high-level crossing eliminated the steep grades and hairpin bends on the old route between Sutherland and Bangor. The 1981 bridge remains in use for local traffic.

The bridge carries River Road between Sutherland and Bangor, and its opening in 2001 let traffic bypass the steep grades and hairpin bends of the old route. The two-lane low-level bridge of 1981, itself replacing a 1912 single-lane timber crossing, still carries local traffic below. Walkers and cyclists use a shared path on the northern side, just under the roadway, reached from Menai Road or Prince Edward Park Road.

The shared pedestrian and cycleway runs on the northern side of the bridge, just beneath the roadway, and is reached from Menai Road on the Bangor side or from Prince Edward Park Road and River Road on the Sutherland side. The low-level 1981 bridge stays open for local traffic.

The bridge's launching abutment has a downhill grade of 4.7%, one of the steepest downhill launchings of any incrementally launched bridge. Its design earned the Australian Construction Achievement Award in 2002.