The S type carriages are a compartment layout passenger carriage used on the railways of Victoria, Australia. The carriages were constructed by the Victorian Railways in 1937 for use on the Spirit of Progress, with additional carriages built until the 1950s for other trains.Introduced by Victorian Railways Chief Commissioner Sir Harold Clapp for the Spirit of Progress service between Melbourne and Albury, the carriages lasted through many decades of regular service across a number of operators.