South Coast MP Shelley Hancock has revealed $630 million of Princes Highway funding announced on Wednesday will be spent on the dangerous stretch between Jervis Bay Road and Sussex Inlet Road.
Parts of the highway will be duplicated, bridges will be built, likely over Wandandian Creek and Condies Creek, and the Jervis Bay Road intersection will be upgraded.
While some media outlets have reported an overpass will be built at Jervis Bay Road, Mrs Hancock would not confirm it.
"We're not sure yet if the overpass will go in, we have to lock in design details," she told the South Coast Register.
"Since we're duplicating the highway further south, an overpass at that intersection makes even more sense.
"My best guess is a really good intersection will be built."
She said designers were hard at work, developing a solution for Bay and Basin residents.
Fixing the stretch between Falls Creek and Tullarwalla (the Sussex Inlet turnoff) will be the government's first priority in its $960 million plan to upgrade the highway, if the Liberals and Nationals are in power after the next election.
The premier, NSW Transport Minister and NSW Roads Minister made the announcement in Tomerong on Wednesday.
Some of the funding will go towards producing detailed designs and engineering works for a Milton-Ulladulla bypass.
"By the end of the term we'll be shovel-ready for that," Mrs Hancock said.
"People down south will be cheering.
"The route has been gazetted, we've been purchasing property, now we start the detailed planning.
"For too long people have been sitting in traffic gridlock, going through Milton, and through Ulladulla, dealing with queues kilometres long."
Further south there will be highway upgrades from Burrill Lake to Batemans Bay and the Moruya bypass will be built.
The plan is to duplicate the road, from Burrill Lake to Batemans Bay, following the completion of the bridge replacement project at Termeil Creek.
"We'd like to get that done this term, if we could get federal government assistance we could expedite that work," Mrs Hancock said.
Premier Gladys Berejiklian said while Commonwealth funding would speed up the process, they would steam ahead with or without it.
"The people of the South Coast and far South Coast have a choice, they know we will duplicate the Princes Highway, we won't stop until we get to the Victorian border, with or without federal assistance," she said.
"We would welcome help, but I'm not going to sit on my hands and wait on anybody else to cough up money.
"We have the money, we're going to make this happen just as we've made other highway upgrades happen."
Less than three weeks out, Labor is tipped to win the state election by a narrow margin according to Sportsbet, and unless the pledge is matched by the ALP the roadworks may not come into fruition.
Ms Berkejiklian has challenged Labor to match the commitment.
The Register has contacted the NSW Labor Party, and awaits comment on the pledge.