In short:
The Werribee Main Road and Princes Highway intersection will close overnight from 7:00 pm to 5:00 am on Friday 26 June, Monday 29 June and Tuesday 30 June as part of the Ison Road Project. Drivers are advised to use Duncans Road and allow up to 20 minutes extra travel time, with the Ison Road overpass on track to open in September 2026.
Duncans Road detour advised
Major works on the Ison Road Project are entering a critical phase, with significant closures planned at the Werribee Main Road and Princes Highway intersection beginning this Friday night.
Works to construct the intersection of Werribee Main Road and the future Ison Road will require significant disruptions from 7:00 pm Friday 26 June to 5:00am Wednesday 1 July, including full closure of the intersection overnight between 7:00 pm and 5:00 am on Friday 26 June, Monday 29 June and Tuesday 30 June.
Drivers are advised to use alternative routes via Duncans Road throughout the closure period and to allow up to 20 minutes of extra travel time. Traffic management will be in place, including reduced speed limits and traffic controllers.
Access to the Maltby Bypass Service Centre and nearby fast food outlets will remain open at all times during the works.
VIDA Roads Program Director Tim Price thanked drivers for their patience. “We thank drivers for their patience while we complete these important upgrades and encourage the community to plan ahead and allow extra travel time during the closures.”
Works are also progressing on a new roundabout to improve access to Wests Road and the Maltby Bypass Service Centre from both the Princes Freeway citybound exit ramp and Geelong Road.
Wyndham City Council Deputy Mayor Jasmine Hill described the closures as a necessary step toward the project’s completion. “These works are a critical step towards opening the Ison Road Overpass and Extension and delivering a vital new connection for Wyndham’s growing community.”
The Ison Road overpass and extension is now expected to open in September 2026, ahead of its original schedule, providing a new link to the Princes Freeway to serve Wyndham’s growing population. The project is jointly funded by the Australian Federal and Victorian State Governments, with the extension component funded by the Victorian State Government and Wyndham City Council.
Major road upgrades across Wyndham are also progressing, including intersection upgrades at Ballan Road in Wyndham Vale and Point Cook Road in Altona Meadows.
Detours and the latest traffic updates are available here.
