Its name is Bella. It is 90 metres long, weighs more than the equivalent of 80 trams and is on its way to Melbourne.

It's one of two $50 million massive tunnel-boring machines that will work all night excavating thousands of tonnes of dirt and rock for the West Gate Tunnel project. Bella will leave China next week for the month-long trip to Australia.

Standing at the tunnelling hub shed in Yarraville to discuss the project, Premier Daniel Andrews said the shed was one piece of the puzzle.

"We’re getting on and delivering this massive piece of road infrastructure, $6.7 billion, 6000 jobs, that critical second river crossing to take the pressure off the West Gate Bridge," he said.