The South Australian Labour Party has promised to extend the tramline along O'Connell Street into North Adelaide, if successfully re-elected.

The new tramline would include 8 new trams to service the new route with a 10-minute frequency.

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