From Wikipedia, the free encyclopedia
Great Britain and India
|Signal||Meaning in Great Britain||Meaning in India|
|1—1||Zone of speed restriction over, resume prescribed speed|
|2||Ready to start||Start train|
|2—2||Do not open doors||Passing automatic signal at 'on'|
|3||Set Back||Guard required by driver|
|3—1||Lock central door locking|
|3—3||Guard required by driver, or guard or driver to speak on the telephone||Guard's warning when the motorman exceeds the speed prescribed|
|3—3—1||Release central door locking|
|4||Slow down||Protect train in rear|
|5||Driver/Guard leaving the train|
|9||Police assistance required|
All codes, except 3—2—1, must be acknowledged by repeating the code received.
In the United States, these are known as Communication Signal Appliance codes.
|_||When running, stop at once.|
|_||When standing, apply or release brakes.|
|o o||When standing, start.|
|o o o||When standing or running backward, back up two car lengths.|
|o o o||When running forward, stop at next passenger station.|
|o o o o||When standing, brakes have applied and released on rear car. Brake test completed.|
|o||When spotting, switching, or making up trains, prepare to stop.|
- Railway block code - bell codes used between manually operated signal boxes
- Whistle codes - used by locomotives to communicate with signal boxes
- "Preparation and movement of trains on ERTMS lines" (PDF). Rail Safety and Standards Board. p. 24. Retrieved 28 December 2013.
- "F. Duties of Staff Working Trains during Journey". Indian Government Railways General Rules. South Eastern Railway. 1999. 4.51. Bell signals between Driver and Guard. Retrieved 16 February 2010.
- "Communicating Signal Appliance" (PDF). Northeast Operating Rules Advisory Committee. 2008. p. 29. Retrieved 9 April 2011.