Trains that would run two storeys above ground in parts of Melbourne is being considered by the Victorian Government as part of its plan to remove level crossings.

But the Opposition has slammed the idea, saying any such development would be ugly, noisy and create suburban wastelands.

The Andrews Government said it was looking at a number of ways to remove the nine level crossings between Dandenong and the CBD, as part of its promise to rid the entire network of them over the next seven years.

Public Transport Minister Jacinta Allan said the Government was consulting with the engineering and construction industry about the different options.

But she said it was too early to say what approach the Government would take.

"We are taking the best of engineering and advice as part of a tender process, and that tender process is underway," she said.

"It's just not appropriate for me to comment, because no final decision has been made on the best way to remove level crossings along this corridor."

Opposition spokesman David Davis said the electorate was not consulted on the idea.

"Nobody voted for a sky train way up in the air, cutting a swathe through densely populated suburbs of Melbourne," he said.

"An ugly sky option can have massive impacts - thunderous noise, the risk of wasteland spaces.

"I think the community has every right to have full say on this and they have not been consulted."

But Ms Allan disputed that claim, and said there had already been community input during the tender process.

"There are two consortiums that are involved in the tender process and the community consultation has informed their designs and their processes," she said.

"No final decision has been taken regarding this rail corridor as the Government gets on with removing the dangerous, congested level crossings it committed to."

She said the final decision would be made in the coming weeks.

Mr Davis said it was important to remove level crossings but it had to be done properly.

"[Victorians] want to see a solution that does not scar the suburbs," he said.

"They want to see a solution that does not impact on the liveability of Melbourne."