page_title: Permissive Working (railway)
hierarchical_section_title: Permissive Working (railway)
caption_attribution_description: English: A British lower-quadrant semaphore stop signal with subsidiary arm below. Español: Señal inglesa de parada con semáforo de cuadrante inferior y auxiliar de brazo por debajo. Source: https://www.flickr.com/photos/frield/30608398/ by User: https://www.flickr.com/people/frield/ Uploaded by -=# Amos E Wolfe talk #=- 18:22, 4 July 2006 (UTC)
context_page_description: Permissive Working 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.
context_section_description: Permissive Working  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.
caption: 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
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