State Transport Minister Jacinta Allan says it’s time for Malcolm Turnbull to walk the walk when it comes to Melbourne’s public transport system.

The Victorian government released its business case the Melbourne Metro Rail project on Tuesday, which will link South Kensington to South Yarra via twin nine-kilometre tunnels.

It will double the size of the city loop.

The government has already committed $4.5 billion to the project, with Premier Daniel Andrews sending the business case to Canberra this week seeking federal funding.

Ms Allan told Tom Elliott she was hopeful of getting it.

‘At the moment, Victoria isn’t getting its fair share of federal infrastructure funding – sitting at around 8 or 9 per cent of infrastructure funding – when we make up 25 per cent of the nation’s population,’ she said on 3AW Drive.

‘That demonstrates we’ve got a bit of a way to go to catch up.

‘But this Melbourne Metro project is a great way for a Prime Minister who talks a lot, and tweets a lot, about catching public transport when he’s in Melbourne to really back in our public transport system.’

Click PLAY below to hear more from Jacinta Allan on 3AW Drive