Definition

This measure reports all Signals Passed At Danger (SPADs), where signals have been passed when a stop aspect, end of in-cab signalled movement authority, or indication (and any associated preceding cautionary indications) was displayed correctly and in sufficient time for the train to be stopped safely at the signal or end of in-cab movement authority.

Signals passed at danger

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Commentary

SPADs have risen slightly this year with an increase in the number of instances where the train reached the fouling point.

There were 25 instances where the train reached the fouling point (the point on a pair of converging tracks where two trains would collide if allowed to approach together). This was a increase from the 18 events last year.

RSSB is conducting an investigation on behalf of the industry to establish what has been causing the volatility in SPAD numbers and to understand the extent to which this is being driven by short term special factors or more pervasive erosion of SPAD reduction and mitigation measures.