Onehunga Harbour Road Bridge, bridge in Onehunga, Auckland

The Onehunga Harbour Road Bridge is a 3.5 m wide walking and cycling bridge that curves over Onehunga Harbour Road at the southwestern edge of Onehunga. Its sweeping, curved structure carries users from Onehunga to the Waikaraka Cycleway and to Old Mangere Bridge, which crosses the Mangere Inlet mouth of the Manukau Harbour.

The crossing of Onehunga Harbour Road was long difficult: over 15,000 vehicles a day used the fast, curved road with limited sightlines. The bridge was designed with local community groups and Cycle Action Auckland as an ancillary project to the State Highway 20 duplication, and was completed in 2010. Builders sank some piles up to 30 m through volcanic deposits to sandstone bedrock, and a nearby SH20 underpass was upgraded in the same project.

The bridge is straightforward to cross on foot or by bicycle. The paths are open and provide good views across the harbour and surrounding areas.