Meanwhile, a ceremony involving NSW Roads Minister Michael Daley and member for Riverina, Kay Hull, will be held further north at Coolac at 11am when the Hume Highway bypass of the village is officially opened.

The final section of the project being undertaken by the Hume Highway Southern Alliance is the northern-most part of new road extending south from Fairbairn Road at Woomargama.

It has involved the construction of new dual carriageway to the west of the existing alignment, including a significant cut through Wrights Hill and the construction of box culverts over Four Mile Creek.

A new southbound carriageway on the eastern side of the existing highway and a new northbound carriageway on the western side of the existing highway have already been opened south to Mullengandra.

That work included construction of a new bridge over Sweetwater Creek and the refurbishment of the existing Sweetwater Creek bridge.

Carol Bartley, stake-holder and community manager with the Hume Highway Southern Alliance, said motorists should still take care on the road.

Ms Bartley said the alliance workers would remain on site for up to two months to complete tie-ins to local roads, landscaping and truck stops.

This opening came in the same week as the opening of the Olympic Highway interchange.

The $179 million Coolac bypass involves 12km of dual carriageway between 12km and 24km north of Gundagai and 4km of existing road between the Dog on the Tucker Box and Muttama Creek.