Sydney Trains is the operator of commuter rail services centred on the Sydney rail network. Sydney Trains is owned and operated by Transport for NSW, a statutory authority of the Government of New South Wales.
The Sydney Trains network comprises seven metropolitan lines with services extending as far as Berowra to the north, Richmond to the north-west, Emu Plains to the west, Waterfall to the south (with some peak hour services continuing to Helensburgh), and Macarthur to the south west.
Most of the Sydney Trains network runs on the surface of suburban areas while some more recently constructed and inner city sections run underground. The network is served by a fleet of double-deck electric multiple units.