Mandurah Estuary Bridge Duplication

Mandurah Road

Under constructionUnder Construction

Construction of a second bridge alongside Mandurah Estuary Bridge.

Mandurah Bridge over river surrounded by trees

What's happening

You can read the October Construction Update.

Traffic realignment on Mandurah Road

Due to recent wet weather, the traffic realignment has been rescheduled to October 2025. As part of continued road construction and clearing for amenity walls with the north-east of the project, traffic will need to be realigned on the western side of the bridge:

  • Westbound traffic will be directed onto the new approach road after the existing bridge.
  • Eastbound traffic will remain in the right-hand lane after the merge point from Old Coast Road and then move back into the left-hand lane before crossing over the bridge.

This will enable necessary working room for amenity wall installation and build the new median strip between old and new approaches.

Egret Point Road closure

From Monday, 13 October to Saturday, 8 November 2025, part of Egret Point Road will be closed while we complete construction of the western abutment and deliver amenity upgrades to the western foreshore.

During this time:

  • local traffic west of the existing bridge will be detoured to Old Coast Road from Bower Drive;
  • local traffic east of the bridge will be detoured via Leisure Way (see map opposite); and
  • pedestrians and cyclists will still have access under the bridge via a temporary footpath.

Upcoming night works

From 22 – 24 October 2025, 7pm to 5am, nightworks are required to set up the new alignment. A detour will be in place for eastbound traffic (towards Perth) with traffic diverted via Old Coast Road and Pinjarra Road.

Westbound traffic will be reduced to one lane over Mandurah Estuary Bridge during this time.

Existing fishing platform

The existing fishing platform remains closed for safety reasons.

Members of the community are requested to refrain from accessing the construction area to access the fishing platform. Fishing and swimming from within the construction area is not recommended.

Roadworks, Path closures and access impacts

Roadworks

  • Egret Point Road between Wedgetail Retreat, Halls Head and Seahawk Drive, Erskine

    Road closure
    Travel map
    • Road closures in place.
    • Detours are West of Bridge at Old Coast Road via Bower Drive and East of Bridge at Leisure Way.
    • Detour map
  • Mandurah Road westbound between Leslie Street and Old Coast Road

    24/7

    Ongoing
    Travel map
    • Westbound traffic will split either side of the median strip just after the Leslie Street traffic light intersection.
    • One lane of westbound will sit in the right-hand lane of the existing eastbound carriageway.
    • The other westbound lane will sit in the right-hand lane of the existing westbound carriageway.
    • The lanes will return to a side-by-side configuration just before the eastern side of the bridge.
    • Speed reduction to 60km/h.
    • Map

Marine Works

  • Estuary Construction Area - 150m either side of the existing bridge

    Ongoing

    Ongoing
    • A reduced 5-knot speed limit is in place
    • Please follow the ‘no wake, no wash’ principle
    • The navigational channel passing underneath the bridge, between piers four and five, has been reduced to a 30m width
    • Estuary users are reminded that works continue in the water, therefore please approach the navigational channel with caution as it is a live construction area
    • All marine traffic, including non-motorised vessels, must use the main navigational channel when traversing the bridge and follow markers and temporary buoys that are in place in the estuary
    • Map

     

Better

connectivity & safety

Improve

traffic flow

Page last reviewed:  | Last updated: 

Acknowledgement of Country

The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

Tell us what you think

Help us improve our website by sharing your thoughts and suggestions.

Provide feedback