Buses The largest element of Adelaide's public transport system is a fleet of diesel, electric, hybrid and natural gas powered buses. The majority of services terminate in the
Adelaide city centre, suburban railway stations or shopping centre interchanges. As contracts are revised for privatised bus operations, more cross suburban routes are added to the network. In the past, bus routes were largely focused on moving passengers from the suburbs to the CBD. A major component of the Adelaide Metro bus service is the
O-Bahn guided busway to
Modbury, carrying around 9 million passengers a year. From its opening in 1986 until August 2011 it was the world's longest busway, with a length of . It remains the world's fastest busway with a maximum permitted speed of . Away from the O-Bahn, whilst there have been dedicated bus lanes and bus-only signal phases at some traffic lights provided for a number of years, a major improvement to bus priority and reliability arrived with the delivery in July 2012 of the CBD Bus Lane project. Adelaide Metro buses are split up geographically into six contract regions, with services operated by
Torrens Connect,
Torrens Transit,
SouthLink and
Busways. The current contracts began in July 2020 for a period of eight years, with an option to extend for two years.
Trains The Adelaide suburban railway network consists of seven lines. On 31 January 2021, operations were contracted to
Keolis Downer. In 2023, the newly elected
Labor state government announced that rail services would return to government operation in January 2025, fulfilling an election commitment by the party. Keolis Downer would then continue to provide maintenance, customer and security services until 2027. The handover of operations back to state government was completed on 2 February 2025. Until 2014, the suburban network was the only one in Australia to operate solely with diesel railcars. Between 2013 and 2014, the full lengths of the
Seaford and
Tonsley lines were electrified, as well as the adjacent segment of the
Belair line from
Goodwood to its terminus at
Adelaide. Electric trains have run on the Seaford and Tonsley lines since 2014. Although the original plans were to electrify the remaining three lines, they were abandoned in 2012. The Gawler line was electrified in 2022. As at March 2025, the fleet consists of 50
3000/3100 class diesel railcars and 34 three-carriage
4000 class electric multiple units. All the remaining
2000/2100 class train cars were retired from service in August 2015. Adelaide's rail lines all run into Adelaide railway station in the CBD. They are:
Rolling stock Trams and
Flexity Classic trams Adelaide's once extensive tram network was dismantled in the middle of the 20th century, leaving only the Glenelg tram running between
Victoria Square in the city-centre and
Moseley Square on the beachfront at
Glenelg. The majority of the line is on a dedicated corridor though the western suburbs, and travels on roadway in the city from the terminus to
South Terrace and along
Jetty Road in Glenelg. An extension of the line from Victoria Square down
King William Street then along
North Terrace opened in October 2007. A further extension along
Port Road to the
Adelaide Entertainment Centre opened in December 2009. The line has stops adjacent to key city points, including
Rundle Mall, the
Adelaide Railway Station and the City West campus of the
University of South Australia. A 2018 extension added stops adjacent to more key locations including the
Festival Theatre, the
Art Gallery, the
University of Adelaide and the
Adelaide Botanic Garden. Construction this new junction, branch lines along the eastern end of North Terrace and King William Road and four new stops began in July/August 2017 and opened in October 2018. There is no fare charged on certain sections of the line. The line is operated from
Glengowrie depot, with 15
Bombardier Flexity Classic trams built between 2005 and 2010 and nine
Alstom Citadis trams that were built for, but were surplus to their needs of
Metro Ligero,
Madrid in 2009. The latter were modified by
Yarra Trams'
Preston Workshops before entering service. A further three unused former Madrid Citadis trams entered service in 2018. In July 2019, the government announced the provision of tram services would be contracted out.
Torrens Connect began operating the trams in July 2020. In 2023, the newly elected
Labor state government announced that tram services would return to government operation in July 2025, fulfilling an election commitment by the party. == Interchanges ==