Major construction work has begun on the new road bridge in Melbourne's western suburb of Ardeer to remove the Fitzgerald Road level crossing.
Newly released concept designs show how key areas along the Melbourne Airport Rail route might look, with Sunshine Station being developed into a transport superhub.
Melbourne's nine-kilometre-long twin Metro Tunnel project has been in the making for almost 30 million hours.
The second and third mini TBMs will join TBM Izzy, with seven launch and retrieval sites dotted around Bulleen Road.
Updated designs can now be viewed by the public for a new station and station precinct as part of the Union Road, Surrey Hills, and Mont Albert Road level crossing removals.