Iron Triangle LimitedThe Iron Triangle Limited was a passenger train operated by Australian National between Adelaide, Port Pirie, Port Augusta, and Whyalla.HistoryThe Iron Triangle Limited first operated on 21 April 1986. It ceased operating on 31 December 1990 when all regional passenger services were withdrawn in South Australia.Rolling stockThe train was formed of CB class railcars. It was operated on occasions by Bluebird railcars.