Your Blue Mountains trip just got harder: why the 'Convict Bridge' is now too dangerous to cross

If you're heading off on a road trip to the Blue Mountains in NSW for Easter, check your routes because a popular stretch of road will be closed for at least 12 weeks.

The Great Western Highway at Victoria Pass will remain closed in both directions for at least three months, following the discovery of a "major geotechnical failure" at the 194-year-old Mitchell's Causeway.

Specialist engineers have warned that the structural integrity of the historic pass - popularly known as the Convict Bridge - is severely compromised, rendering the road unsafe for all traffic.

The NSW Government says it is being "upfront" about the severity of the situation, confirming that even under the most optimistic scenario, remediation will take months.

They say this is not a standard repair; it is a complex engineering crisis involving a fragile heritage site that serves as a vital artery for the Blue Mountains and Central West communities.

The closure was triggered after monitoring by Transport for NSW detected significant cracking and movement in the bridge's substructure.

Because the Causeway is a unique 19th-century structure, engineers can't simply apply modern patches without risking a total collapse of the mountain pass.

For the next two weeks, the site must remain entirely vibration-free to allow for specialist 3D imaging and geotechnical testing.

This data is essential to understand the full extent of the damage.

Minister for Roads Jenny Aitchison has ruled out any "shortcuts on safety," noting that the repair phase alone will require at least two additional months of intensive work.

Motorists are urged to avoid the area where possible, as the primary detour via the Darling Causeway and Bells Line of Road is currently adding at least 25 minutes to travel times.

Heavy traffic and significant delays are expected, particularly during peak periods and on weekends.

For long-distance travel, authorities recommend bypassing the Mountains entirely via the Hume Highway or Golden Highway.

While 90 staff are working around the clock to manage the crisis, the message from the Government is clear: the road cannot and will not reopen until it is safe.

"I will be honest and upfront to the people of the Blue Mountains and the Central West: this closure is expected to remain in place for at least three months - it is incredibly serious," Minister Jenny Aitchison said at Mount Victoria on Friday.

Ms Aitchison has underscored the gravity of the situation, acknowledging that while the decision to close the pass is difficult, it is necessary to prevent a tragedy.

Recognising the "real hardship" this causes for families, students and freight operators, a suite of emergency transport measures is being rolled out immediately.

This story was first published on March 13, 2026