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In railway signalling, a tablet (or token, depending on the form of it employed on the railway) is a physical object which an engine driver is required to have or see before entering onto a particular section of single track. The tablet is clearly endorsed with the names of the section it belongs to. A tablet system is used for single lines because of the greater risk of collision in the event of a mistake being made by a signalman or driver, than on double lines. |
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