A state Labor candidate says the NSW government is to blame for traffic failures around Albion Park caused by consistent rainfall closing local roads.

The recently completed $630 million dollar Albion Park Rail Bypass has provided the long-awaited missing road link between Bomaderry and Sydney.

But M1 access roads through Albion Park are now flooding regularly, causing traffic chaos in the wet.

Kiama candidate Katelin McInerney said there should have been better planning for weather events.

She also said funding was needed for an upgrade to Tripoli Way to take the pressure off Tongarra Road.

"Where we have seen a failure is this state Liberal government hasn't put the money on the table to connect that bypass to the state road at either end," she said.

Ms McInerney said the state government and former Liberal MP, turned Independent, Gareth Ward were to blame. 

"Both Mr Ward and the state government were made aware of the risk of not raising the old road under the bypass and they were also made aware of the risk of not putting in the Tripoli Way bypass at that time," she said.

Ward defends bypass

Mr Ward stood by the delivery of the bypass.

"I am very proud of the Albion Park Rail Bypass," Mr Ward said.

"It's the largest single investment in the history of the highway," he said. 

"I want to make sure we are doing everything we can to fix the issues we are seeing as best we can."

Mr Ward said the reason Tripoli Road wasn't built earlier was that it was a local road and Shellharbour Council didn't ask earlier for state funding.

"I've secured $4.2 million to help council with the project," Mr Ward said.

"It was the first time they had raised cost concerns."

Regional Roads Minister, Sam Farraway is due to visit Shellharbour on Wednesday and meet with both Shellharbour mayor Chris Homer and Mr Ward.