The roadworks are expected to provide a significant boost for freight productivity and enhancing road safety throughout the state's south-west.

Parliamentary secretary for the Deputy Premier John Barilaro, Steph Cooke was this week joined by Hilltops Council representatives to officially open the $1.1 million stage 2 Cunningar Road rehabilitation upgrade.

"This new heavy vehicle route has been several years in the making and I'm delighted the NSW Government has been able to help Hilltops Council make it happen through the Fixing Country Roads program," Ms Cooke said.

Cunningar Road was previously unsuitable for B-doubles due to the pavement condition and road width, but it's now been widened and resealed, allowing it to be reclassified for higher mass limit vehicles up to 26 metres long.

Minister for Regional Transport and Roads Paul Toole said the upgrade would benefit both regional freight as well as local producers.

"The opening of Cunningar Road to high productivity vehicles improves access to both the Boorowa and Cunningar silos as well as the Yass Saleyards," Mr Toole said.

"It helps to reduce the costs and transport times in moving product to market.

"These road projects are so important to regional communities as we help to deliver a safer, more efficient road network across regional NSW."

Hilltops Council Mayor Brian Ingram said Hilltops Council received more than $1 million towards the project as part of round three of the Fixing Country Roads program.

"This funding builds upon previous works on Cunningar Road supported by previous program rounds," Cr Ingram said.

"I am very pleased with the progress of the Cunningar Road upgrade and what it means for the Hilltops community, especially local producers and heavy vehicle operators.

"Ensuring our road network is safe and efficient for heavy vehicle use is a priority," he said.

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