Narrow-gauge railway

A narrow-gauge railway (also called a narrow-gauge railroad in the United States) is a railway with a track gauge that is narrower than the usual 1,435 mm (4 ft 8 1⁄2 in).
Most narrow-gauge railways are between 600 mm (1 ft 11 5⁄8 in) and 1,067 mm (3 ft 6 in) wide.
In some countries around the world, including Japan, Indonesia, South Africa, New Zealand, Malaysia, Taiwan and some states of Australia, a narrow-gauge is the standard railway gauge.