Railways**** with**** a track gauge of**** **** fall**** within**** the category**** of**** broad gauge railways****.**** , they were extant in Australia, Brazil and on the island of Ireland.

History

Nomenclature

Installations

Similar gauges

The Pennsylvania trolley gauges of and are similar to this gauge, but incompatible. There is also a SEPTA subway–surface trolley lines gauge. See: Track gauge in Ireland.

Locomotives

Before the advent of diesel and electric traction, one of the advantages of the broader Irish gauge compared to was that more space between steam locomotive frames allows for a bigger firebox, enabling generation of more steam.