The NSW Government has announced it is building a new bridge at Victoria Pass. Construction starts in July 2026. This ends nearly four months of confusion about when the Great Western Highway would reopen.

The problem started on 5 March 2026, when Transport for NSW found damage to Mitchells Causeway and closed one of the two lanes heading east toward Sydney. Drivers had to take a long detour instead. The highway is the main route through the Blue Mountains, carrying trucks and commuters every day. By May, even the state's Road Minister admitted in parliament that nobody knew when it would reopen.

Mitchells Causeway is not just any bridge. It was built starting in 1830 and opened in 1832 — nearly 200 years ago. It is one of the oldest structures on the highway and officially recognised as heritage, which means it is protected by law. That made the repair job harder: engineers had to find a solution that would not destroy this historic piece of the state's past.

By May, engineering firms were working on different options. The government's decision, announced on 26 June, is to build a brand-new bridge right next to the old one. Traffic will use the new bridge while the original 1832 causeway stands alongside it.

Businesses in the region have suffered during the closure. Shops and freight companies in towns like Lithgow depend on the highway. The government's announcement specifically mentions relief for these affected businesses.

Here is what we don't yet know: what happens to the old bridge in the long term. Keeping it standing next to the new road is good for history, but someone will need to decide how to maintain it, whether the public can visit it, and how it fits with the new bridge. These decisions belong to the NSW Heritage Council and will take time.

Construction in July means work will happen during the dry months of winter and early spring. If everything goes to plan, the new bridge could be open to traffic by the end of 2026. But geology in the Blue Mountains is tricky, and heritage rules may slow things down. What matters now is that there is finally a contract and a date. For a road that has been broken for four months with no clear answer, that is real progress.