A major road closure in New South Wales’ Blue Mountains is causing significant travel disruptions and growing frustration among local residents. The shutdown of a key section of the Great Western Highway, linking Sydney with the state’s central west, has forced thousands of motorists onto lengthy detours while authorities assess structural damage to a historic bridge.
Historic Convict Bridge Closed After Structural Damage
The affected structure, known locally as Mitchells Causeway or the “Convict Bridge”, dates back to 1832. Built by convict labour during the early colonial period, the sandstone causeway at Victoria Pass served traffic for nearly two centuries.
Last weekend, Transport for NSW closed the Victoria Pass section of the Great Western Highway after engineers discovered significant cracking in the bridge’s structure.
NSW Roads Minister Jenny Aitchison confirmed on Friday that the road will remain closed for at least three months. Authorities say the closure follows what has been described as a major geotechnical failure, which caused movement within the bridge.
Photographs from the site show long, winding cracks spreading across the road surface — a visible sign of the underlying structural stress.
Major Travel Delays for Motorists
The closure is having an immediate impact on traffic through the Blue Mountains, a vital transport corridor for commuters, freight operators and regional travellers.
Around 12,000 vehicles typically cross the bridge each day. With the route now shut, motorists travelling between Sydney and communities such as Lithgow must take alternative routes.
For many drivers, this means detours adding up to two hours during peak travel times.
Transport authorities have increased bus and train services in an attempt to ease congestion, but the disruption has already affected families, schools and local businesses.
Local Businesses Feeling the Impact
Lithgow mayor Cassandra Coleman said some businesses are already suffering sharp losses in revenue, particularly in the nearby village of Little Hartley.
“One business told us they’ve lost around 70% of their takings,” Coleman said.
Although the village remains accessible by car, it is now effectively bypassed by the diverted highway route between Mount Victoria and Lithgow.
Coleman said the NSW government has agreed to update road signage after early detour instructions mistakenly suggested Little Hartley was accessible to “residents only.”
Community Frustration Builds
The road closure has sparked strong reactions across the region.
Nationals MP for Bathurst and former deputy premier Paul Toole, whose electorate includes Victoria Pass, warned the situation could escalate further if repairs take longer than expected.
“Even one day beyond the three-month timeline will cause more red-hot anger in the community,” he said.
Residents are already feeling the impact. One Hartley local, Celine Watz, said children travelling home from school in Mount Victoria are now facing two-hour journeys.
Before the closure, the drive through Victoria Pass took around 10 minutes.
Lithgow resident Kylie Mackey said the detours will make it harder to visit family in Sydney and expects the repairs may take longer than announced.
“It’ll be a hell of a lot longer than that,” she said.
Heavy traffic is also affecting Lithgow itself, with diverted vehicles now travelling through the town’s main street.
“We’re already seeing damage to our local roads from the heavy vehicles coming through,” Mackey added.
Engineers Investigate the Cause
Engineers have begun extensive testing to determine exactly what caused the structural failure.
According to Minister Aitchison, specialists require at least two weeks of testing and 3D imaging, which must be carried out without traffic crossing the bridge.
Even under the most optimistic scenario, she said, repairs to make the road safe would take a further two months.
“There will be no shortcuts on safety – we will not risk lives,” Aitchison said, apologising to residents for the disruption.
Health authorities in the region have also advised hospital staff, patients and visitors to allow extra travel time when heading to facilities in Lithgow and the Blue Mountains.
Emergency vehicles can still access the highway up to the closure point, with alternate routes available if needed.
Long-Running Debate Over Blue Mountains Transport
The current crisis has revived debate over the long-term future of the Great Western Highway.
Previous state and federal Coalition governments funded early stages of a 34-kilometre road upgrade between Katoomba and Lithgow, which included plans for an 11-kilometre twin tunnel beneath Victoria Pass.
However, the project stalled in recent years.
The Perrottet government halted additional funding in 2022, and in 2023 the Minns government shelved the project after the federal government withdrew a $2 billion commitment.
Remaining funds were redirected toward road maintenance projects across western Sydney and regional NSW.
Despite the cancellation, $232 million was already spent building a 2.4-kilometre dual-lane section of highway at each end of the proposed tunnel, leaving what critics describe as a partially completed “road to nowhere”.
Toole argues the government is addressing only the immediate problem.
“They’re fixing a fragile piece of road, but there’s still no long-term vision,” he said.
An Ageing Structure Under Pressure
Some engineers say the bridge’s longevity is remarkable.
Civil engineering professor Behzad Fatahi from the University of Technology Sydney said it was “phenomenal” that the structure has lasted so long without the structural elements found in modern bridges.
Over time, the crushed sandstone used by convict workers may have deteriorated.
“Pieces of this material can break down into smaller fragments,” Fatahi said. “Water gets in and gradually washes it out.”
One possible medium-term solution could involve injecting cement into voids within the structure to strengthen it.
In the longer term, however, tunnels bypassing Victoria Pass may be the most reliable option.
Residents Adjust to a New Reality
For now, communities across the Blue Mountains and Lithgow are adjusting to the detours and heavier traffic.
One Lithgow resident said the sudden surge in vehicles along her street has made sleep difficult.
“Our neighbours have started calling it the ‘New Great Western Highway’,” she said.
Conclusion
The closure of the historic Convict Bridge highlights both the vulnerability of ageing infrastructure and the challenges of maintaining critical transport links in regional New South Wales. While repairs are expected to take at least three months, the disruption has reignited calls for a long-term solution to ensure reliable access between Sydney and the state’s central west.
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