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The Sydney light rail system has four lines. The system is owned by the Government of New South Wales. The first three lines are operated under contract by Transdev Sydney, while the L4 Westmead & Carlingford Line is operated by Great River City Light Rail, a joint venture between Transdev and CAF.
The first light rail line in Sydney is the Inner West Light Rail, operated under the name L1 Dulwich Hill Line. This line is mostly within the corridor of a closed heavy rail goods line, with a small section running along streets in the Sydney central business district (CBD). This line has 12.7 kilometres (7.9 mi) of track and twenty-three stops. The first section, ten stops between Central station and Wentworth Park via Darling Harbour and Pyrmont, opened on 11 August 1997. A four-stop extension from Wentworth Park to Lilyfield opened on 13 August 2000, and a nine stop extension from Lilyfield to Dulwich Hill opened on 27 March 2014.
The second and third light rail lines opened as part of the CBD and South East Light Rail, which has nineteen stops in total and consists of two branches that combine within the CBD. The L2 Randwick Line branch has four unique stops and the L3 Kingsford Line branch has five unique stops. The L2 Randwick Line opened on 14 December 2019 with fourteen new stops, and the five remaining stops opened on 3 April 2020, when the L3 Kingsford Line began.
On 20 December 2024, stage one of the Parramatta Light Rail opened under the name L4 Westmead & Carlingford Line. This stage has sixteen stops over 12 kilometres (7 mi) of track. Stage two is expected to begin construction in 2025, with fourteen additional stops over 10 kilometres (6 mi) of track.