converted to standard gauge, the narrow gauge from Terowie was converted to broad gauge to Peterborough. Peterborough became the change of gauge station for Broken Hill Adelaide express. The narrow gauge line was retained north from Peterborough to Quorn. The main interstate links from Adelaide to Perth, Darwin, Melbourne, and Sydney are all of standard gauge. Operators The country railways were initially owned by South Australian Railways. The narrow gauge lines north and west of Quorn were handed over to the Commonwealth Railways in 1926, though the Commonwealth had had financial responsibility for these lines since 1911. The Commonwealth Railways later merged with the SAR to become the Australian National Railways Commission (ANR) in 1978. The metropolitan railway lines are now owned and operated by Adelaide Metro, interstate passenger services operated by Journey Beyond, intrastate freight by One Rail Australia, and interstate freight by a number of companies including Bowmans Rail, One Rail Australia, Pacific National and SCT Logistics. Passenger services Passenger services in South Australia have declined since the days of the South Australian Railways, today the only services are the Adelaide Metro suburban services; and the Journey Beyond operated The Overland between Adelaide and Melbourne, the Indian Pacific between Perth and Sydney via Adelaide, and The Ghan from Adelaide to Darwin, via Alice Springs. No country passenger rail services have operated in South Australia since 1990. Railway preservation Port Adelaide is home to the National Railway Museum, the largest undercover railway museum in Australia. The SteamRanger Heritage Railway in the Adelaide Hills has restored a number of steam and diesel locomotives for tourist services on the Victor Harbor railway line, operating between Mount Barker and Victor Harbor. The Pichi Richi Railway Preservation Society based in Quorn operates on part of the former Central Australia Railway. The Steamtown Heritage Rail Centre is a static railway museum based in the former railway workshops in Peterborough. Other heritage operations have included the Lions Club of YP Rail (Wallaroo–Kadina), Limestone Coast Railway (on the Mount Gambier railway line from Mount Gambier railway station), Cobdogla Steam Friends, Steamtown Peterborough Railway Preservation Society (Peterborough–Eurelia) and the Australian Society of Section Car Operators (accreditation in SA surrendered in 2010). History The first railway in colonial South Australia was the horse-drawn tramway from Goolwa to Port Elliot opened in 1854, providing a rail link from the port of Goolwa on the Murray River to an ocean