The Sydney–Brisbane railway corridor consists of the 987-kilometre (613-mile) long 1435 mm (4 ft 8+1⁄2 in) standard-gauge main line between the Australian state capitals of Brisbane (Queensland) and Sydney (New South Wales), and the lines immediately connected to it.

[1] The main line consists of: Freight trains operate along the entire corridor, as does a daily (each way) XPT passenger service, in addition to a service to Casino.

Originally the corridor consisted of 1435 mm (4 ft 8+1⁄2 in) standard gauge track in New South Wales and 1067 mm (3 ft 6 in) narrow gauge track in Queensland, which met at a break-of-gauge station at Wallangarra.

In 1930 the NSW North Coast line was extended from Casino to Brisbane making through services possible,[2][3] using a rail ferry for the river crossing in Grafton until the Grafton Bridge opened in 1932.

[4] The superseded Main Northern railway line, which went to Wallangarra, now terminates near Armidale.