6029 is a four-cylinder, simple, non-condensing, superheated, articulated 4-8-4+4-8-4 Garratt steam locomotive, of the AD60 class, built by Beyer, Peacock & Company, Manchester, England, for the New South Wales Government Railways.

It worked from Sydney to Goulburn in December 1974 before hauling a special charter to Canberra on 5 January 1975.

[4] Heritage tours continued over several years until boiler problems caused the locomotive to be withdrawn from service in 1981.

[1][8][9][10] On 23 February 2015, the locomotive was named City of Canberra by Shane Rattenbury, the Speaker of the ACT Legislative Assembly.

[citation needed] This was due to the locomotive no longer based in Canberra and for historic reasons as the AD60s were barred from travelling though single line tunnels during their service, of which three exist between Bungendore and Queanbeyan on the Bombala railway line.