Permissive Working (railway)

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The smaller signal arm is a 'Calling On' signal, which when showing 'Proceed' allows a train to enter a section already occupied by another train


Permissive Working [1] on a railway in the United Kingdom allows more than one train at a time to be on the same line in a block section, a signal section or a dead-end platform line.




Contents





  • 1 Authorisation


  • 2 Exceptions


  • 3 Driving towards another train


  • 4 References




Authorisation


The areas where Permissive Working is allowed are given in Table A of the Network Rail Sectional Appendix.



Exceptions


Even where it is not authorised, a shunting movement can be allowed to enter a portion of line that is already occupied providing that it is for the purpose of:


  • attaching vehicles

  • detaching vehicles

  • removing vehicles.


Driving towards another train


When it is permitted to drive a train towards the rear of another train, such as where trains queue to enter or exit a depot, the driver must:


  • proceed with caution

  • not pass a signal which has been cleared for the train in front until it has been replaced to danger and then cleared for his movement.


References




  1. ^ UK Rulebook - Permissive Working. GE/RT8000 Rule Book Module TW1 (Train Working) Section 20 (PDF). 





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