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Whats interlocking?

interlocking
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Whats interlocking?

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In order to ensure that the signalling system never provides unsafe (conflicting) signals and the points are not set for more than one train that might end up proceeding on to the same section of track and hence suffering a collision, various schemes have been developed to coordinate the settings of the points and the signals within the region controlled by a signalbox or signal cabin. Mechanically operated interlocking The most prevalent systems today [2003] are still mechanical interlocking schemes that coordinate the positions of the levers controlling the points with the signals governing that section of track and connected branches, loops, or sidings. For instance, in one common scheme, a key that allows setting the points for a route has to be obtained from the block instrument, and as long as the key is removed the instrument cannot be set to provide Line Clear for a conflicting route. The wires that operate signals, and the rods that control points, are all interconnected in th

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