The state government has committed $80 million dollars to building the bridge from Newnham to Riverside and asking the commonwealth government to fund the remaining $320 million within their first 100 days if re-elected.

The proposed bridge would connect the East Tamar Highway, near the University Way intersection, to the West Tamar Highway, north of Cormiston Road.

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Labor infrastructure spokesman Shane Broad said the public could not trust the Liberals to deliver on the Tamar Project after only delivering a feasibility study in the past three years.

"People have to understand [with] the Liberals, there's a whole bunch of projects right around the state that haven't progressed past the pretty picture stage," he said.

"[You] can't stick out a pretty picture on the eve of every election and pretend that the next time around they've done a bunch of work when they've done zero."

Mr Broad confirmed if elected to government, Labor would look to perform a feasibility study and start construction.

"We'd hope to do the feasibility [study] and start construction, but like I said we're not just interested in one project to fix Launceston's traffic ... it is going to need a number of projects to solve that problem," he said.

Greens candidate for Bass, Jack Davenport, labelled the government's plan for Tamar Bridge 'short-sighted'.

"The Liberals' Tamar Bridge promise is typically short-sighted," he said.

"For decades, short-sighted Liberal and Labor governments have failed to plan ahead and meet the demands of our growing cities and regions."

Mr Broad argued Labor's plan for infrastructure, which spans a ten-year timeframe, would be much more comprehensive and successful.

"We are not talking about one project, we are talking about an entire ten year strategy for Launceston's traffic, we are coming at this [issue] from many different angles," he said.

"Our infrastructure program is around ten year plans for a whole bunch of projects like the Bass Highway for example ... we've got to talk about that as a major project over the next ten years to fix it now and into the future."

Mr Davenport said the plan for the Tamar would not improve Launceston's livability as a city

"Building more roads and widening existing roads won't make Launceston a more livable city," he said.

"Launceston needs is a greater investment in public transport, park and ride facilities, and cycling and pedestrian infrastructure."

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