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    https://en.wikipedia.org › wiki › Token_(railway_signalling)

    Token (railway signalling) - Wikipedia

    Principle

    The operation of a bidirectional single track line has the hazard of two trains colliding. The simplest way to prevent such collisions is to have only one train in the section at any given time. Such a system is known as "one-engin… See more

    Token systems

    The token system was developed in Britain in the 19th century, to enable safe working of single-line railways. For the very first time this system was proposed by Mr. Henry Woodhouse for Standedge Tunnels in 1849. If a b… See more

    Collection of the token

    In a basic railway situation, the token can be collected personally by the driver at the start of the crew's work on a branch line, and surrendered at the end of their work there.
    Where the … See more

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