Token (railway signalling)
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In railway signalling, a token is a physical object which a train driver is required to have or see before entering onto a particular section of single track. The token is clearly endorsed with the na
A token being offered by a signalman on the Keighley & Worth Valley Railway
Examples of single line tokens: Tablet on left, key token on right
One Train Only token used by Indian Railways
Electric staff instruments manufactured by Webb and Thompson
Signalling block system
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A signalling block system is a safety mechanism primarily found on railways that is used to prevent trains from colliding. Block systems divide the track into fixed segments using signals, sensors, or
Token (railway signalling)
…days, the second train could proceed after a designated time interval, as on double lines at the time. However, after the Armagh rail disaster of 1889, block working became mandatory. Seeing the train staff provided assurance that there could be no head-on collision. To ensure that the ticket was not issued incorrectly…
A block instrument on the Midland Railway
Accepting a token on the South Devon Railway
Telegraph block instruments of standard British Railways design. The bell is in the bottom part with the key for sounding the bell in the next signal box. Above that is the switch for indicating whether the section of line is clear (green), there is a train in that section (red) or the normal "line blocked" state (white).
Vertical colour light signal on the Enshū Railway Line in Japan