The Route
The New Perth Bunbury Highway (NPBH) is a dynamic and challenging infrastructure project, involving design and construction of 70.5 kilometres of dual carriageway.
NPBH is under construction as a single project and will extend the dual carriageway from Kwinana Freeway at Safety Bay Road in Baldivis, around the eastern side of the Peel Inlet and Harvey Estuary to join the existing dual carriageway on Old Coast Road at Lake Clifton.
The NPBH will be constructed to freeway standard from Safety Bay Road to South Yunderup a distance of some 32 kilometres. The remainder of the route, 38 kilometres, will initially be built as a rural highway, with the ability to upgrade it in the future as traffic demands increase.
Funded by both the Commonwealth and State Government of Western Australia, the project will double the length of the existing freeway network and provide a high standard inter-regional road link that will improve transport connectivity and road safety.
The route will link Perth and the South West, bypassing the heavily populated areas in Mandurah and the Dawesville Peninsula, and avoiding inland communities on the existing highway. The result will see the NPBH reduce travel time for road users by around 30 minutes.
Five interchanges will be constructed at Safety Bay Road, Karnup Road, Paganoni Road, Lakes Road and Pinjarra Road.
Nine intersections will be constructed and will have the capacity to be upgraded to interchanges in the future. They will be located at Beacham Road, Greenlands Road, Paull Road, Mills Road, Herron Point Road, Old Bunbury Road, Dorsett Road, Old Coast Road and Peppermint Grove Road.
In total, 19 bridges will be built to grade separate the interchanges and extend the NPBH over the Serpentine River, Nambeelup Brook, Murray River/Pinjarra Road, South Yunderup Road, Murray River floodplain, Harvey River and a number of Water Corporation drains.
As the largest infrastructure project ever undertaken by Main Roads, NPBH is expected to greatly benefit Western Australians by enhancing efficiency and accessibility of the State’s road network.
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