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AWS sunflower

The AWS ( Automatic Warning System ) is a safety system that is mandatory on all mainline registered UK trains. If the proceeding signal is at caution or danger, then the system shall activate a warning sound that the driver has to cancel within about 3 seconds. It is there to prevent or reduce a Signal Passed At Danger ( SPAD ) This photo was taken from the cab of 158797, operated by Northern Rail.

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Uploaded on June 14, 2013
Taken on June 2, 2013