QR Limited is the company government-owned corporation responsible for the operation and maintenance of the railway system in the State of Queensland, Australia. Previously known as Queensland Rail, Queensland Railways and Queensland Government Railways over its 141 year existence, it maintains the physical infrastructure of the railway network and also directly operates all commuter (Citytrain) and long-distance (Traveltrain) passenger services and the vast majority of freight rail services (QRNational).

Company structure
Unlike the freight railway systems in all other Australian States, QR remains in full State ownership, and private sector involvement in the operation of train services remains minimal. Pacific National, through subsidiary company Pacific National Queensland, is the only private operator to run freight trains on QR rails, hauling container traffic between Brisbane and Cairns.
QR now boasts a route network of over 9,000 km of which some 1,000 km are electrified at 25kVAC. This is largest electrified network in the southern hemisphere. The backbone of the network – the North Coast Line from Brisbane north to Cairns – is electrified as far north as Rockhampton, approximately 600 km (375 miles) north of Brisbane. Most of the lines used to transport coal from inland mines to coastal ports are also electrified. Many coal trains in Queensland are hauled by multiple locomotives, with remotely controlled locomotives in the middle. These trains are some of the heaviest in the world and can reach over four kilometers in length.
Queensland's railways are among the safest in the world, a condition resulting from their high-quality track and the maintenance of their rolling stock. The most recent passenger accident was in November 2004, when a coastal tilt train from Brisbane to Cairns derailed at more than 112 km/h. [1] There were no fatalities among the 150 people injured. [2]

Company timeline

QRNational
Citytrain
Traveltrain