Rail loading gauge

Profile through which a railway vehicle and its loads must pass, taking into account tunnels and trackside obstacles. These gauges are indicated for individual lines. There are four basic gauges recognised by the International Union of Railways (UIC): international gauge and A, B and C gauges. Combined transport consignments often exceed loading gauges A and B. Another gauge of particular significance for combined transport is the B+ gauge. There are also many other gauge codes (P, C, S, etc.) recognised.