2012 in rail transport


 * 14 January – The Marina Bay Extension of the Circle MRT Line in Singapore opens for service.
 * 4 February - National Express's East Anglia passenger service franchise expires; from the following day services are taken over by Abellio's Greater Anglia operation.
 * 13 June - The Manchester Metrolink light rail system opens the first phase of its Oldham & Rochdale Line over the former Oldham Loop Line to a temporary terminus at Oldham Mumps.
 * 3 October - The UK Department for Transport announces cancellation and rerunning of the InterCity West Coast passenger service franchise bidding process after discovering significant technical flaws in its assessment, reversing an August decision to award it to FirstGroup and following challenges by incumbent operator Virgin Trains.