SA Labor has unveiled another major public transport election promise, committing to extend the tramline along O'Connell Street into North Adelaide if re-elected next month.

The pledge for the $259 million first stage of the ProspectLink extension follows yesterday's announcement of a $279 million tram extension into Norwood, into the heart of Liberal leader Steven Marshall's electorate.

That announcement drew a major distinction between the two parties, with Mr Marshall declaring Labor's promise would never be delivered, and saying the Liberal Party would not match it.

The 2-kilometre North Adelaide extension would see trams travel along King William Road and O'Connell Street, with new stops at the Adelaide Oval, Women's and Children's Hospital, Archer Street and Piccadilly Cinema.

"Not only will this project create construction jobs, but reinvigorate O'Connell Street, helping to attract more visitors and investment, boost economic activity and encourage urban renewal," Premier Jay Weatherill said.

Labor said if re-elected, it would purchase eight new trams to service the route with a 10-minute frequency.

The Adelaide tram network would be extended to Norwood and North Adelaide at a cost of more than $500 million. ( ABC News: Malcolm Sutton )

The free travel zone, which spares passengers from purchasing or validating a ticket, would be extended into North Adelaide.

Like the Norwood extension, work on the project would start in the 2018/19 financial year and take about two years to complete.

Despite his opposition to a tram extension into his electorate, Mr Marshall said he would consider Labor's plan to extend it into North Adelaide.

"We think there is much more logic to at least take the tram at least up to Adelaide Oval. Stopping it where it is at the moment is just embarrassing," the Liberal leader said.

"We will be announcing our public transport policy during the election campaign."

Mr Marshall was asked whether a tram connecting the inner eastern suburbs to the site would bring more people to the precinct, but he continued to oppose the proposal.

"The people of Norwood do not support a tram out to Norwood. They like the street the way that it is with their street trees," Mr Marshall said.

"They will be absolutely destroyed, parking will be destroyed, traffic will be disrupted."

Liberals commit $60 million to create food education hub

Trams have not travelled along O'Connell Street since they were removed more than 60 years ago.

Mr Weatherill said the policy announcement builds on his Government's decision to spend $10 million to help the Adelaide City Council purchase the long-vacant Le Cornu site for redevelopment.

"South Australian jobs are our number one priority which is why a re-elected Labor Government will expand our tram network to North Adelaide — supporting an average 133 construction jobs a year," Mr Weatherill said.

Artist's impression of the proposed Adelaide tramline extension up The Parade to Norwood. ( Supplied: SA Government )

The North Adelaide tram extension is the final piece of Labor's $2.3 billion infrastructure package unveiled by the Premier at his campaign launch.

The package also includes the removal of seven suburban level crossings and a $150 million government contribution to a deep sea port on Spencer Gulf.

Mr Marshall today announced a Liberal government would spend $60 million to move the International College of Hotel Management and the Le Cordon Bleu school from Regency Park TAFE, to a new facility the old Royal Adelaide Hospital site.

He said a food education precinct would attract more local and international students.

"This facility, built in the 1970s, is now tired. It is not competing with the very best international colleges that exist right around the world," he said.

"The Liberal Party believes there's a great opportunity and that is to build a new facility on the old Royal Adelaide Hospital site."