Grampians

Horsham junction upgrade

We're delivering a new roundabout and associated upgrades to the Henty Highway, Western Highway, Golf Course Road and Plumpton Road intersection in Horsham, to improve safety and traffic flow.

Project status:

Underway

The Australian Government has committed $12.31 million towards the project, with the Victorian Government committing $2.07 million. The project is part of the Australian and Victorian governments’ $2.5 billion investment into the Western Highway corridor.

Image of map shwoing the Horsham intersection upgrade map

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Update - October 2026

Major works started in December 2025 and will take approximately 12 months to complete.

Disruptions - major works

Crews will be on site Monday to Saturday between 7am to 6pm, with nightworks required at times. To keep everyone safe, speed limits will be reduced to 40km/h and single lane closures will be in place near the intersection.

Traffic controllers will be on site to help road users travel safely through the area. Crews will aim to minimise delays and access impacts as much as possible.

Please look out for signs, follow the direction of traffic controllers and allow for extra time when travelling through the area.

Nightworks, changed traffic conditions and closures - from late October/early November

Final asphalt and linemarking works are planned to take place from late October or early November 2026.

These works will be undertaken at night to complete work safely and minimise disruptions.

Crews are expected to be on site for 5 nights, between 8pm and 6am. Dates will be published on this webpage when confirmed.

Please note: Dates and times of these works are subject to change due to weather impacts and site conditions, and may be rescheduled, if required.

Closures and disruptions

During nightworks, temporary closures will be required at Henty Highway, Plumpton Road, Golf Course Road and Derry Parade. These closures will be staged to minimise impacts. Short detours will be in place, and signed, as required.

The Western Highway will remain open. Traffic will occasionally be reduced to a single lane and stopped for short periods under direction of traffic controllers.

There may be restrictions to the service lane on the eastern side of the Western Highway at times. Traffic management will be in place to guide residents in the area.

The intersection will be fully reopened after each night shift.

During the night works, traffic management will also include:

increased noise, light and vibration
reduced speed limits
single lane closures on the Western Highway (the highway will remain open to all traffic in both directions)
delays of up to five minutes, at times

Property access

While access to residential properties and businesses will be retained, there will be periods of disruption. Please follow all roadwork and directional signage, and instructions from traffic controllers.

Remaining works

Following the completion of asphalt and linemarking, minor works will continue during the day, including public lighting works and site clean-up.
Minimal traffic management will be in place until the public lights are activated.

About the project

Major works will include:

Earthworks
Water main relocation
Drainage, pavement, kerb and channel construction
Realignment of the local roads to provide safer approach angles
Construction of a shared path to provide safer crossing opportunities for pedestrians and bike riders
Construction of a dedicated slip lane for southbound traffic on Western Highway
Asphalting and line marking
Public lighting and landscaping

Background

The intersection of the Henty Highway, Western Highway, Golf Course Road and Plumpton Road is one of Horsham’s key entrance points and caters for 18,000 vehicles per day, with 18 per cent of the volume heavy vehicles. Between 1 January 2019 and 31 December 2023, there were 12 crashes at or near this intersection, with six resulting in serious injuries.

The Western and Henty Highways are relied on heavily by farming industry, grain production, regional tourism and manufacturing services. Golf Course Road and Plumpton Road service an industrial zone and are used heavily by freight.

With traffic flow anticipated to increase due to population and industry growth in the region, we are constructing a new roundabout to simplify the intersection, and improve safety and efficiency for all road users.

Benefits

Reduced risk and severity of crashes
Improved access and traffic flow
Increased network capacity resulting in improved travel times and freight efficiency
Better access for local businesses
Safer and more accessible movements for pedestrians and cyclists