- November 2019 - Transport for NSW (TfNSW) reveals the strategic corridor for the proposed upgrade and puts it to the community for feedback, with a deadline of 16 December 2019.
- 26th November, 2019 - Save Centennial Glen Facebook group created
- 16th December, 2019 - Save Centennial Glen group submits Save Centennial Glen Final Submission
- May 2020 - TfNSW publishes Great Western Highway Upgrade Program – Katoomba to Lithgow Community Consultation Summary Report
- 6th May, 2020: First meeting of Blackheath Co-design Committee
- June 3rd, 2020: Second meeting of Blackheath Co-design committee
- June 20th, 2020: Walkaround with TfNSW and BCC representatives
- July 2nd, 2020: Third meeting of Blackheath Co-design Committee
- July 27th, 2020: Formation of Save Blackheath Alliance
- August 19, 2020: Fourth and final meeting of the Blackheath Co-design Committee
- October 12, 2020: Minister Toole announced that the Government will not be building a bypass through Centennial Glen. See Centennial Glen Saved.
- November 28, 2020: Community consultation on preferred tunnel option closed.
