The Adelaide Metro 4000 class, also referred to as A-City trains, are electric multiple unit trains built by Bombardier Transportation (later Alstom) in Dandenong, Victoria for the electrified Adelaide rail network. They are the only class of operational electric trains in South Australia,"Adelaide's A-City EMU Surburban Trains" Railway Digest December 2014 pages 44/45 running services on the Gawler, Seaford and Flinders lines.
History In the 2008/09 State Budget, it was announced that five out of six of Adelaide's railway lines were to be electrified commencing with the Noarlunga and Gawler lines. This was to have resulted in 58 of the 3000/3100 class railcars being converted to electric operation with the remaining 12 to be retained as diesels for operation on the Belair line."Adelaide rail electrification and tram extension" Railway Digest August 2008 page 18More standing room on trains Adelaide Advertiser 24 September 2008Budget 2008/09 Government of South Australia The electrification was scaled back and Bombardier Transportation was awarded a contract to build 22 three-carriage trains for the Adelaide rail network in 2011 instead."Bombardier preferred supplier for Adelaide's electric trains" Railway Digest January 2011 page 6 The first of these trains were delivered in July 2013, and entered service on 23 February 2014 on the Seaford and Tonsley (now Flinders) lines."Seaford Rail Extension opens for business" Railway Digest April 2014 page 16 The last entered service in October 2015."Bombardier completes Adelaide EMU project" Track & Signal January 2016 page 82 Their design shared similarities to the V/Line VLocity and Transperth B-series trains, also built by Bombardier.
When they were ordered, it was proposed that the Gawler line would be electrified, which would allow the trains to access Adelaide Metro's Dry Creek depot. However, before they were delivered, that project was temporarily cancelled. Whilst light maintenance was performed at their primary stabling point at Seaford Meadows, heavy maintenance needed to occur at Dry Creek. When required, each train was hauled there from Adelaide station by a pair of 3000 class railcars. This movement was ceased once the Gawler line was electrified in 2022.
In June 2019, a further 12 train sets were ordered for the Gawler line electrification, the first of which was delivered in mid-late 2021 and entered service on 4 March 2022. The latter were built by Alstom.
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