Mooney Mooney Bridge, Cantilever bridge in New South Wales, Australia

Mooney Mooney Bridge is a twin cantilever bridge of post-tensioned concrete carrying the M1 Pacific Motorway across Mooney Mooney Creek. Each bridge has a 220-metre main span and approach spans of 135 and 131 metres, supported by tall rectangular piers. Its three-span haunched girders and two-rail parapet keep the structure low and open to views of the surrounding bushland.

The bridge opened in 1986 following its inauguration by Prime Minister Bob Hawke. It represented a major advancement in connecting Sydney to the Central Coast and Hunter Region through a direct highway route.

Locals call it the NSW Big Dipper Bridge for the dip and rise of the motorway across its curving deck. Its two-rail parapet was chosen so drivers keep sightlines over the bushland of Brisbane Water National Park. The design by Bruce Judd of the Department of Main Roads became a reference standard for bridge design across New South Wales.

This bridge carries heavy traffic as part of the M1 Pacific Motorway and is maintained by Transport for NSW. Expect busy conditions during peak hours, particularly when traveling between Sydney and the northern coastal areas.

Engineer Bruce Judd designed this structure with features that let travelers look toward the surrounding Brisbane Water National Park while crossing. The parapet design balances safety with sightlines, offering glimpses of the landscape below as vehicles pass over.