Interested in talking motorbikes with a terrific community of riders? Signup (it's quick and free) to join the discussions and access the full suite of tools and information that Netrider has to offer.
In rail transport, track gauge is the spacing of the rails on a railway track and is measured between the inner faces of the load-bearing rails.
All vehicles on a network must have running gear that is compatible with the track gauge, and in the earliest days of railways the selection of a proposed railway's 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 gauge and actual gauge at some locality, due to divergence of track components from the nominal. Railway engineers use a device, like a caliper, to measure the actual gauge, and this device is also referred to as a track gauge.