NSW gov release on 18 July says;

Construction on the Rozelle Interchange has entered the final stage with confirmation today that major tunneling excavation on the world-class project is now complete.  

Premier Dominic Perrottet said the NSW Government is delivering on its vision of state-changing transport infrastructure for motorists that is more reliable and better connected.  

“This government is committed to transforming our state’s transport infrastructure for this generation and the next with our almost $77 billion investment over the next four years,” Mr Perrottet said. 

“Rozelle Interchange will become a critical link in our Sydney road network, connecting drivers not only to the M4-M5 Link Tunnels, but to the City West Link, the Western Distributor and the future Western Harbour Tunnel.  

“This milestone represents a major piece of the jigsaw coming together as we move another step closer to a better-connected Sydney, one with safer and less congested roads meaning motorists will ultimately have more time to do the things they want to do.” 

Minister for Metropolitan Roads Natalie Ward says the Rozelle Interchange will transform travel for motorists across Sydney. 

“Rozelle Interchange is the final and signature component of the WestConnex project, which will ease congestion on the road network and provide Sydney motorists quicker and safer trips,” Mrs Ward said. 

“Once completed WestConnex will cut travel time from Western Sydney to the CBD by up to 20 minutes with 100,000 vehicles expected to travel through the interchange every day.”

The Rozelle Interchange project includes Western Harbour Tunnel enabling work, and completing the M4-M5 Link tunnels. 

The Rozelle Interchange project will now move into the final fit out and then commissioning stage for the tunnel, as it gets ready to open to motorists in late 2023.

https://www.transport.nsw.gov.au/news-and-events/media-releases/major-tunneling-excavation-complete-on-rozelle-interchange