It is unclear what rail gauge would be used for the proposed tunnel (and associated infrastructure) .

The company also operates two rail gauge changing facilities on the France/Spain border.

Normally, it is used to transport equipment of a different rail gauge.

The rail gauge of the lines between Burnie was the same all the way to Queenstown.

It was a rail gauge, to measure the distance between the rails by hand for comparison with electronic readings.

No interchange of cars was possible with the latter two railroads due to the difference in rail gauge.

A big challenge is the differences in rail gauge across Eurasia.

Various sizes of rail gauge exist around the world.

It was built with a rail gauge of 2 feet (610 mm).

He is credited with selecting the five-foot rail gauge still used in Russia and neighboring countries.