Early funding for South Coast Princes Highway upgrades would be boosted under a Labor government, according to an election promise made on Monday.
Labor has already promised to match the federal government's $500 million for the highway which was contained in the April Budget.
However there would only be $100 million spent over the next four years - with nothing at all in 2019-20.
Labor has promised to bring forward more than that over the next four years.
"A Shorten Labor Government will accelerate safety upgrades to the Princes Highway south of Nowra by bringing forward $100 million in federal funding," said a joint statement from Shadow Infrastructure spokesman Anthony Albanese, Gilmore candidate Fiona Phillips and Eden-Monaro MP Mike Kelly.
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"All up, a Shorten Labor Government will invest $150 million over the next four years."
Labor said its total commitment to the highway will be $500 million and it would work with the NSW Government to speed up projects between Jervis Bay Road and Moruya, including a bypass at Moruya.
The $150 million funding would include work on upgrading the intersection between Jervis Bay Road and the Princes Highway, as well as dealing with the so-called "mad mile" stretch of the highway just south of Batemans Bay.
Also on the list would be duplicating sections of road between Jervis Bay Road and Sussex Inlet Road and constructing the Moruya Bypass.
Detailed planning work for the Milton and Ulladulla Bypass and upgrades to the Highway from Burrill Lake to Batemans Bay would also be in line for funding.
Labor said the Morrison Government would delay most promised funding until 2023-24.