Rail Gauge
Track gauge is a technical term used in rail transport to define the spacing of the rails in an individual railway track.
All the vehicles operating over a network must have running gear that is compatible with the track gauge, and in the earliest days of railways, selection of a proposed railway's track gauge was a key issue.
As the dominant parameter determining interoperability, it is still frequently used as a descriptor of a route or network.
There is a distinction between the nominal track gauge of a network and the actual current track gauge at some locality, due to divergence of the track components from the nominal. Railway engineers use a device to measure the actual track gauge, and this device is also referred to (in another sense of the words) as a track gauge.
Read more about Rail Gauge: Nominal Track Gauge, Terminology, Maintenance Standards, Dominant Gauges, Future, Temporary Way - Permanent Way, Pioneers, See Also
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“For this is the mark of a wise and upright man, not to rail against the gods in misfortune.”
—Aeschylus (525–456 B.C.)