In South Australia, work on Port Pirie to Broken Hill did not start until 1963. The narrow gauge lines from Gladstone and Peterborough were not converted, with triple gauge yards provided. Standard gauge access to Adelaide was not provided. From Cockburn to Broken Hill a new railway was built on an improved alignment, avoiding the private Silverton Tramway route. The completion of this link enabled the first "Indian Pacific" to run across the nation in March 1970 from Sydney to Perth.