Minister for Regional Transport and Roads Paul Toole said more residents would now be able to experience the new motorway for the first time.

"With the opening of northbound lanes, we are now one step closer to delivering faster, safer journeys between Sydney and Bomaderry," Mr Toole said.

"Those locals who braved the elements to attend the community event in June have seen first hand what a game changer this bypass will be.

"Sixteen intersections will be bypassed when the motorway is fully open, delivering a time saving of up to 30 per cent, and returning local streets to local communities with 65 per cent of traffic expected to use the bypass instead."

Kiama MP Gareth Ward said one of the reasons he stood for Parliament was to fix the Princes Highway, and said he'd since helped deliver more than $2 billion of NSW Government funds for upgrades to the highway.

"I am delighted to be able to report to you that in the early hours of this morning, we removed the final barricades on the northbound lanes on the Albion Park Rail bypass," he said on Saturday. "Northbound commuters now won't see a single traffic light between Bomaderry and Heathcote.

Mr Ward thanked the team at Fulton Hogan that had delivered the project on-budget and one year ahead of schedule.

"I have worked closely with Fulton Hogan on a number of our highway projects including the Gerringong duplication, the Berry bypass and the Shoalhaven River Bridge," he said.

"When I committed the NSW Government to this project, we also committed to the largest single infrastructure project in the history of our region and the largest single investment in the history of the Princes Highway. This project is a massive achievement for our community.

"There is still some work to do, but I anticipate having the entire project complete by the end of the year."

Mr Toole said there will be additional traffic changes between now and the end of the year, including new traffic lights at Tongarra Road, and Transport for NSW would be monitoring closely how traffic flows.

"Traffic flow has improved as a result of adjustments to the timing of the lights at the Oak Flats interchange during peak times, but this will be an ongoing process as more changes occur and we thank the community for their patience," he said.

Other traffic changes up to the end of 2021 including the opening of northbound and southbound ramps and the activation of new traffic lights at Tongarra Road.

Road users travelling to Albion Park Rail will now need to exit at the Oak Flats interchange and a temporary left turn will be provided for road users exiting at Tongarra Road until both ramps are complete.

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