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  • Driver forgot to stop at station - what about signals?
    This works with the signal being held at danger until the train occupies a track circuit a set distance in rear of the signal causing the signal to change to a proceed aspect However these too can become a SPAD trap by the driver developing an excpectation of the signal clearing and approaching too fast and the signalman needing to stop the train and holding the signal at danger
  • Signals and points failure - Network Rail
    Our network is designed so that if something stops working, such as a signal or a set of points, trains will stop before they reach it So if there’s a power failure, the signal goes black and the driver knows not to pass a signal unless it has a green or yellow light; and if a point fails, the last signal before the set of points affected will automatically turn red so no trains pass
  • rules for replacing stop signals behind trains - Permanent Way . . . - RMweb
    The situation with the distant signal is different because having the distant signal "off" locked all of the associated stop signals "off" Replacing the distant once the driver had passed it gave the signalman the ability to instantly put back any or all of the stop signals in an emergency situation, most old-time bobbies could tell of several occasions when they had had to do just that
  • Why signals display stop commands, when there is no train for miles . . .
    There are probably two different signal logics involved: Automatic Block Signal (ABS) usually display Clear unless there is some obstruction or another train ahead One at the approach to a slow-order curve might only clear to Pass at reduced speed prepared to stop at the next signal In short-block territory approaching a terminal there might be a whole pageful of increasingly restrictive
  • Signalling - operational changes - Open Rails
    Signals will always clear on request except when the section immediately behind the signal is already cleared for a train from the opposite direction The normal route-setting limitations etc are ignored The signal will only clear to the first available most restrictive aspect above Stop
  • Stop and Distant Signals – The Signal Box
    At any signal box, there may be several stop signals serving each line Most commonly there are two, with the first to be reached by a train (known as the home signal) protecting any points, level crossings etc , and the second (the starting signal) ahead of any points and guarding the entrance to the block section ahead More complex layouts can have many stop signals per line, perhaps named
  • Signalling failures: why do we hear about them so much? - Rail UK
    Signalling is fundamental to the safe operation of the railway, ensuring that trains are spaced safely apart and conflicting movements are avoided Railway signals are ‘traffic light’ devices, which tell a train driver if it’s safe to proceed along the track As with road traffic lights, a driver shouldn’t pass a red signal
  • Signal Passed at Danger - RailUK Forums
    maybe the signal failed as the driver approached it, so he stopped where he was and contacted the signaller, who gave him permission to proceed to the signal( driver would sound his horn to let anyone working around the track that he was about to move(may have been S T working on the signal)), and pass this at danger and proceed at caution and obey all other signals
  • Signals explained - Network Rail
    Signals – the lineside pieces of equipment that tell drivers if they can pass safely Cab signalling – a signalling system where the indication to proceed is given to the driver on a display within the cab rather than by lineside signals Signalling – the broader system that controls train movements
  • Service Failure: Signal Passed At Danger - What Am I Doing Wrong?
    Red signals mean stop You must stop before the signal otherwise you will get a SPAD - Signal Passed At Danger Only proceed once the signal has changed to green When you start to see yellow signals, reduce speed in anticipation for a red signal The signal sequence will be double yellow, yellow, red
  • Passing Signals at Danger
    So we set off, arrive at the first signal, I stop the train and do my PA to the customers I blow the whistle, and move off until the train passes the raised trainstop and comes to a halt The tripcock's reset, the air to the brake system recharged, I blow the whistle again and we head off (now 'at a speed which allows me to stop the train





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