The WA Government will unveil the long-awaited details of its transport blueprint for Perth this morning.

Senior Ministers are hoping the plan is a winner with the public, with transport set to be a key battleground at next year's state election.

The ABC has already revealed the plan includes new tunnels, extra bridges across the Swan River and new train lines.

The plan, known as Transport@3.5 million, provides a long-term vision to guide development of WA's transport network for Perth and Peel, with an expected 800,000 new homes required over the next 35 to 40 years.

Transport planners believe that would nearly double the number of trips made every day in and around Perth, leading to more than 12 million trips a day.

The plan also confirmed the Government had axed its 2013 election promise to build the Max Light Rail line out to Mirrabooka.

The Government has come under fire for dumping the MAX light rail, three years after it went to the 2013 election promising a "fully-cost, fully-funded" MAX Light Rail to Mirrabooka.

But State Development Minister Bill Marmion said he did not believe the Government would have a problem convincing the public it was serious about public transport.

"Look I'm sure they've got it right; I've obviously seen an advance copy of it," he said.

"It's a terrific plan and I'm sure the public of Western Australia will like it when the minister releases it."

Labor calls plan release a 'pre-election stunt'

However, Opposition leader Mark McGowan has questioned the timing of the release.

"It's a pre-election stunt to try and get the Government re-elected and to lift Mr Nalder's standing versus Mr Barnett, that's all it is," he said.

Mr McGowan said the Government was appalling when it came to delivery, but great at making glossy documents.

"When they release their plan tomorrow, everyone needs to look at it through the historical record, and the historical record is they break their word when it comes to transport plans," he said.