Track gauge
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Track gauge or rail gauge is the distance between the inner sides of the heads of the two load bearing rails that make up a single railway line. This is opposed to loading gauge which defines the maximum height and width for railway vehicles. Sixty percent of the world's railways use Stephenson's 4 ft 8½ in (1,435 mm) standard gauge. Wider gauges are called broad gauge; smaller gauges, narrow gauge. Break-of-gauge refers to the meeting of different gauges. Some stretches of track are dual gauge, with three or four rails, allowing trains of different gauges to share them. Gauge conversion can resolve break-of-gauge problems. Some electrified railways use non load bearing third rail and occasionally a fourth rail. These additional rails are positioned between or outside the “running rails” to feed and return electrical current; they do not define the rail gauge.
- Related: Loading gauge, Structure gauge, Rail terminology, Longest trains, Rail transport by country, Breitspurbahn, Gauge conversion, Heaviest trains, Minimum railway curve radius, Third rail, Model railway scales
| A history of track gauge A history of track gauge www.trains.com/trn/default.aspx?c=a&id=234 - Web |
| Railroad Gauge Width Railroad Gauge Width parovoz.com/spravka/gauges-e.html - Web |
| European Railway Agency: 1520 mm systems European Railway Agency: 1520 mm systems www.era.eu.int/.../CR%20TSI%20-%205%20-%201520%20 mm%20system.aspx - Web |
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| The Indian Railways FAQ: Gauges The Indian Railways FAQ: Gauges irfca.org/faq/faq-gauge.html - Web |
| The Days they Changed the Gauge in the U.S. South The Days they Changed the Gauge in the U.S. South southern.railfan.net/ties/1966/66-8/gauge.html - Web |
