Labor has promised a $120 million upgrade to Adelaide's Southern Expressway, but it relies on the party winning both the state and federal elections.
Under the plan, a South Australian Labor government would provide $60 million to the project, with the same to come from the Commonwealth if federal Opposition Leader Anthony Albanese is elected prime minister.
Mr Albanese joined SA Labor leader Peter Malinauskas on the campaign trail on Monday, just 12 days out from the state election on March 19.
He said a federal Labor government would be a willing partner in the plan for new on and off-ramps where the expressway meets Majors Road in a bid to ease traffic congestion in Adelaide's south.
"This project is an example of federal and state Labor coming together to make a practical difference to people's lives," Mr Albanese said.
"It will mean people can get to work quicker, it will mean people can get to sporting events ... and it also means safer roads as well.
"I love building infrastructure. I want to build roads and rail lines throughout the country."
Also on the campaign trail on Monday, Premier Steven Marshall committed a re-elected Liberal government to invest a further $12 million to extend the Skilling South Australia program for a further 12 months.
Mr Marshall said the program would help deliver another 12,000 new apprenticeships and traineeships.
"South Australia's outstanding results in skills training during the last four years has played a significant role in the state having the fastest growing economy in the nation," he said.
"The 53,000 apprenticeship and trainee commencements since we came to office has turned around the exodus of young people from South Australia to the eastern seaboard in search of a job."
