At a parliamentary hearing on Monday, the council's infrastructure services manager Raoul Harper said the works proposed between Brisbane Street, Launceston, and Legana Park Drive, Legana, were partly outside of the municipality.

"Let me make it clear that the West Tamar Highway Safety Committee is not supportive of that allocation outside of the West Tamar municipality at this time," Mr Harper said.

While there are six proposed projects, only four were scheduled for discussion at this hearing.

The works between Launceston and Legana were not one of the four projects and were not considered.

Committee member Liberal MHA Mark Shelton reminded the council that if recommendations from the hearing were not passed, the whole project could be deferred.

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Mr Harper said the council was "very supportive" of the Department of State Growth's project one, which includes safety improvements between the Gravelly Beach and Rosevears Drive intersection to address the narrow width, gravel verges, sight deficiencies from property access points, along with highway stormwater runoff.

"That that is very much seen as our number one priority ... This is a classic project that has been in the too-hard basket for far too long," Mr Harper said.

"We believe this is the one opportunity where it should be done once and it should be done well."

The council said it would have liked roundabouts to be included for upgrades near Exeter.

Designs presented were very broad, committee members said.

The Department of State Growth said it was looking to progress the $12 million state election commitment.

The committee will now decide if the proposal is the best solution. A number of other upgrades are also proposed for the highway.