Overview

• All five stations, including the complex Town Hall and State Library in the CBD, are now complete after tunnelling beneath the existing City Loop.
• Premier Jacinta Allan announced the early December opening window following months of questions over a possible staged launch.
• The nine‑kilometre twin tunnels will connect the Sunbury line to the Cranbourne and Pakenham lines, forming a single 97km corridor through five new underground stations.
• Officials say extensive signalling tests continue and the project requires the most comprehensive re‑timetabling of the network in years to integrate services.
• The project’s cost has risen from an initial $10.9b to $13.48b for core works, with reports indicating the overall bill exceeds $15b after additional payments and delays.