Standard Gauge for railways with 1435mm RailGauge track gauge

The standard gauge (also Stephenson gauge after George Stephenson, International gauge or normal gauge) is a widely used railway track gauge. Approximately 60% of lines in the world are this gauge (see the list of countries that use the standard gauge). Except for Russia, Finland, Portugal and some upgraded lines in Spain, all high-speed lines are this gauge.

The distance between the inside edges of the rails is usually called 1,435 mm…