London Underground code alert
A London Underground code alert is a warning issued by a London Underground Line Controller (who oversees the running of a line in conjunction with the signal operator) over the radio system giving both train and station staff information about a potential problem. The codes are rarely used as they are specifically reserved for emergency situations.
Codes
Code | Response |
---|---|
Amber | All trains to go no further than the next station as far as possible while obeying all signals.[1] The order stops the trains but permits the rapid evacuation of carriages and stations and the rerouting of passengers. A code amber alert was issued in response to both the London bombings on 7 July[2] and 21 July in 2005.[3] |
Red | Immediate stop order issued to all trains irrespective of their locations.[4] This could result in getting passengers out from trains stopped away from platforms or part-way down tunnels. In these cases, special procedures would be required to evacuate the carriages when considering the presence of electrified rails in the tunnels. |
Emergency | A specific area has to be evacuated. This code is used to evacuate a section of the line when life and safety is in direct peril.[5] This code allows abnormal movement of trains (For example: trains moving in the wrong direction to reach a station.). |
See also
References
- ↑ Rule Book 7 Train incidents and safety equipment p11 - 12 STAFF ISSUED ONLY
- ↑ "Tube log shows initial confusion". BBC. 12 July 2005. Retrieved 28 May 2014.
- ↑ Millward, David (2010-07-22). "Code Amber as Tube avoids a complete shutdown". The Daily Telegraph. London: Daily Telegraph. Retrieved 2010-10-11.
- ↑ Rule Book 7 Train incidents and safety equipment p12 STAFF ISSUED ONLY
- ↑ Rule Book 7 Train incidents and safety equipment p13 STAFF ISSUED ONLY
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