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Signal passed at danger

18:00

SPAD risk 1 - Signal Passed at Danger

7:49

SPAD risk 2 - Signal Passed at Danger

9:09

SPAD risk 3 - Signal Passed at Danger

2:11

Train 210 and the Blank Signal

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Doctor invents system to halt accidents at railway crossings

A signal passed at danger (SPAD) in railway terminology of many countries, including Australia and the UK, occurs when a train passes a stop signal without authority to do so. The United States's National Transportation Safety Board (NTSB), which investigates railway accidents in that country, typically terms this as running a red signal.
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    • Causes 

    • Collision prevention systems 

    • Passing signals at danger – with authority 

    • Accidents involving a signal passed at danger without authority 

    • Accidents following a signal passed at danger with authority 

    • Accidents where the signaller incorrectly authorised a driver to pass a signal at danger