New and extended clearways are being installed between the Hume Highway at Villawood and Parramatta Road in Parramatta.
Widening and rebuilding works are set to start this week on a three kilometres section of Denman Road and Denman, north of the Golden Highway.
Construction of a second river crossing between Victoria and New South Wales at Echuca and Moama is set to begin in 2020.
Five kilometres of new single lane highway has opened at Pimlico as part of the Woolgoolga to Ballina Pacific Highway upgrade.
The New South Wales government has made $150 million available for applications as part of the Fixing Country Roads grants.