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Bullhead rail was the standard for the British railway system from the mid-19th until the mid-20th century. In 1954, bullhead rail was used on 449 miles (723 km) of new track and flat-bottom rail on 923 miles (1,485 km). [13] One of the first British Standards, BS 9, was for bullhead rail, which was originally published in 1905, and revised in ...
Track gauge or rail gauge (also known as track gage in North America [8]) is the distance between the inner sides (gauge sides) of the heads of the two load bearing rails that make up a single railway line. Each country uses different gauges for different types of trains.
Alignment – "Alignment is the projection of the track geometry of each rail or the track center line onto the horizontal plane," (FRA Definition). [8] Also known as the "straightness" of the tracks. Crosslevel – The variation in cant of the track over the length of a predetermined "chord" length (generally sixty-two feet). On straight or ...
Too tight a 'crest' curve could result in the train leaving the track as it drops away beneath it; too tight a 'trough' and the train will plough downwards into the rails and damage them. More precisely, the support force R exerted by the track on a train as a function of the curve radius r, the train mass m, and the speed v, is given by
In the 1830s Robert L. Stevens invented the flanged 'tee' rail (actually a distorted I beam), which had a flat bottom and required no chair; a similar design was the contemporary bridge rail (of inverted U section with a bottom flange and laid on longitudinal sleepers); these rails were initially nailed directly to the sleeper. [4]
A Class 158 DMU on the Kyle of Lochalsh Line, a primarily single-track railway in Scotland A train on the Long Island Rail Road's single-tracked Central Branch A train on the Jinhua–Wenzhou Railway, a single-track railway in Southern Zhejiang Province, China Single track on the Stony Point Line in the Australian state of Victoria
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