Local residents gathered on Thursday morning as part of a united call from members of the Bay and Basin community.

Residents don't want a roundabout at the intersection, with them preferring, for safety reasons, a flyover.

"We have had accidents and deaths - it [the intersection] is terrifying. It's ridiculous to think of a roundabout in the middle of the highway," the resident said.

"They have the money for infrastructure, which lets us push for the best result we can - a flyover."

One Vincentia resident has children and grandchildren who use the intersection each day and fears for their safety

"It's a dangerous and confusing intersection for drivers coming at high speed," another local resident said.

Another resident dreads having to use the intersection and would avoid the stretch of road if she could.

One resident said he would like to quote the AusRoad guidelines for road making in Australia.

"Basically their consideration for an intersection like this, where numerous vehicles come out of Jervis Bay Road at high speeds, is they recommend you should avoid 90-degree interaction between vehicles, " the resident said.

"The only way to do that is to put in a flyover."

He added a roundabout would not stop the congestion issues.

"A flyover is the only answer to ease the congestion but also critical for safety reasons," he said

"We have great big trucks steaming past here this morning and these cars are taking the chance to sneak out when they can."

He added many elderly residents dread having to go into Nowra because they have to use the intersection.

"They put their lives in others' hands," the resident added.

Vincentia Matters secretary, Liz Tooley, said Thursday morning's event was a united stand against what was said in the media in regards to the intersection.

Mrs Tooley said State Member for the South Coast Shelley Hancock virtually took the option for a flyover off the table.

"We find that unacceptable and we are asking Shelley Hancock to please support her constituents who are speaking loudly and clearing that a roundabout will not solve the problem of this intersection and it's only a flyover that will solve it," Mrs Tooley said.

"I don't see why this intersection is any different to other intersections on the highway between Kiama and Bomaderry - there are no roundabouts on the new section of the highway. They have flyovers and underpasses for everything.

"Yet on this intersection, we seem to have to jump through hoops and hold community consultations for years on end.

"The community is speaking loudly and clearly."

Mrs Tooley said they put their thoughts on the issue on Facebook only two days ago and had thousands of hits.

The cost could be a factor and Mrs Tooley assumes a flyover would cost more than a roundabout.

However, Mrs Tooley said cost should not be a factor when it comes to possibly saving someone's life.

"There is only one solution for the safety and congestion issues and that is a flyover," she said.

"The state government has to realise this intersection is vital to the wellbeing of the Bay and Basin community."

Mrs Tooley said the state government has even labelled the intersection as dangerous, critical and the busiest between Nowra and the Victorian border.

"There is absolutely no reason why they can't make a commitment for a flyover," Mrs Tooley said.

The good news is a flyover could be still on the cards.

Speaking at the recent sod-turning for the new $342 million Nowra bridge, Mrs Hancock said discussions with the community were almost complete and she "wants to get a start on the project", believing Transport for NSW will "come up with the right option" as they have on other projects on the South Coast.

She admitted, in some cases, roundabouts weren't the best solution, and an overpass, "which the community seems to favour" was still an option on the table.

"The community seems to favour an overpass, so we've still got that option on the table," she said.

"We're going to make sure we do the correct modelling to make sure whatever option we choose eases congestion at Jervis Bay Road.

"We've looked at an overpass, it has perhaps some unintended consequences because it will wipe out most of Falls Creek on the western side of the highway."

She said that area is home to at least one business and several homes.

"We have to consider everybody. There are also some environmental consequences and Aboriginal heritage issues we need to address," she said.

"I'm confident they will come up with the best option - as they did with the Berry bypass, like they did with Berry to Bomaderry, like they will with the Nowra bridge, and did with the Burrill Lake bridge, fantastic.

"But I think if you have a well-designed roundabout it is much better than many other solutions you could possibly proffer. It's obviously an option. We have roundabouts on our highways everywhere and they work well.

"I can guarantee we will come up with the best option to ease traffic congestion for residents and tourists, in particular, coming out of Jervis Bay Road and wanting to join the highway and travel north."

Meanwhile, vice-president of the Basin Villages Forum Narrell Brown said safety must be in the forefront of the decision-making process.

"This intersection and the safety of the highway users needs to be seen as a possibility of mitigating further accidents and congestion has to be at the forefront of all discussion," Ms Brown said.

"The community is waiting on this government to do the only right things at this location - a grade-separated interchange [a flyover] is the only acceptable solution."