Great Western Highway looking towards Hartley Valley

Great Western Highway Upgrade Program - Katoomba to Lithgow

The NSW Government is investing $2.5 billion towards upgrading the Great Western Highway between Katoomba and Lithgow to a four lane carriageway. Once completed, the upgrade will reduce congestion and deliver safer, more efficient and reliable journeys for those travelling in, around and through the Blue Mountains, while also better connecting communities in the Central West.

Info graphic

The first, of many rounds of consultation, closed in December 2019. We want to thank the community for providing valuable feedback. We have now published the Community Consultation Summary Report which responds to the 1759 submissions received from community members in and beyond the Blue Mountains. View or download the Community Consultation Summary Report.

In July 2020, we consulted with the community in Medlow Bath on a strategic design for the duplication of the Highway in the town centre. A Consultation Summary Report is currently being prepared and will be made available in November 2020.

Consultation is now open for the community to provide feedback on route options in Blackheath.

The NSW Government has progressively upgraded sections of the highway to make it safer and reliable with the most recent project at Kelso opened to traffic in March 2017. In 2018, $30 million was announced to upgrade the highway between Kelso and Raglan.

There have already been important safety improvements delivered through the safety upgrade program along the Great Western Highway at Blackheath, Mount Victoria and Forty Bends. This work has seen improved road surfaces, intersection upgrades, and lane widening delivered as part of the $250 million investment by the Australian and NSW governments.

Project information

In November and December 2019 Transport for NSW held the first round of community consultation on the proposed upgrade from Katoomba to Lithgow. The Community Consultation Summary Report (PDF, 18.4Mb), summarises what you have told us so far, and allows us to provide information on key areas that you are interested in, like the environment and road use, safety, village impacts, and freight.

The Blackheath Co-Design Committee (BCC) was formed by Transport for NSW in March 2020, following feedback from the community. The Committee included stakeholder group representatives, selected community representatives, and representatives from the Blue Mountains City Council and emergency services.

The BCC was not a decision making body, but the outcome of the BCC is an important input into the Government’s decision-making process for determining a preferred route option and design as the program progresses.

The Committee’s unanimously preferred option, of the options available, is for a long tunnel underneath Blackheath.

Minutes of meetings

View or download:



Our latest Community Update is now available with information on community consultation in Medlow Bath including FAQs, how to have your say and project next steps. Download the August community update (PDF, 1.3Mb) for more information.

Project documents


Contact us

If you have any questions or would like more information please contact our project team:

Phone: 1800 953 777


Post: Great Western Highway Upgrade Program - PO Box 2332, Orange NSW 2800

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