Originally, various track gauges were used in the United States. Some railways, primarily in the northeast, used standard gauge of 4 ft 8+1⁄2 in (1,435 mm); others...

A standard-gauge railway is a railway with a track gauge of 1,435 mm (4 ft 8+1⁄2 in). The standard gauge is also called Stephenson gauge (after George...

In rail transport, track gauge is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible...

Standard gauge was favored for railway construction in the United States, although a fairly large narrow-gauge system developed in the Rocky Mountains...

railway track gauge of 5 ft (1,524 mm) first appeared in the United Kingdom and the United States. This gauge became commonly known as "Russian gauge", because...

Track gauge in Canada is standard gauge of 4 ft 8+1⁄2 in (1,435 mm), except for Toronto transit systems and the White Pass and Yukon Route. Rail lines...

Broad gauge of 1,520 mm (4 ft 11+27⁄32 in), more known as Russian gauge, is the dominant track gauge in former Soviet Union countries (CIS states, Baltic...

alternating current O gauge was the most common model railroad scale in the United States and remained so until the early 1960s. In Europe, its popularity...

Variable gauge systems allow railway vehicles to travel between two railways with different track gauges. Vehicles are equipped with variable gauge axles...

track gauges by size. A gauge is measured between the inner faces of the rails. For ridable miniature railways and minimum gauge railways, the gauges...