RSSB2726 - T1143 Devices to guide derailed trains

RAIB have noted a sequence of derailment incidents over many years where the lateral excursion of the lead vehicle has been limited by engagement between vehicle and track features that were not intended for that purpose. The most recent of these was in September 2016 at Watford Junction where the right-hand rail engaged between the traction motor and gearbox housings of the derailed vehicle and limited the deviation from the track and as a consequence reduced the severity of the impact with an oncoming vehicle. RAIB have made recommendations to consider the use of mechanical devices or structures to guide derailed trains with the latest recommendation in recommendation 3 of the Watfo…

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