A double-track railway usually involves running one track in each direction, compared to a single-track railway, where trains in both directions share the same track. == Overview == In the earliest days of railways in the United Kingdom, most lines were built as double-track because of the difficulty of co-ordinating operations before the invention of the telegraph.
A double-track railway usually involves running one track in each direction, compared to a single-track railway, where trains in both directions share the same track. == Overview == In the earliest days of railways in the United Kingdom, most lines were built as double-track because of the difficulty of co-ordinating operations before the invention of the telegraph.
Source: Wikipedia "Double-track railway" · CC BY-SA 4.0
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