Overspeeding? Not on our watch
RSSB’s Joe Wilson and Spence Hufton give an update on the latest developments to mitigate overspeed risk.
While the risk of overspeeding is managed within the ORR’s Railway Undertakings’ Safety Management Systems, recent events continue to show that sustained focus is required to prevent what is in fact a precursor to a serious incident, like a derailment or collision. Despite ongoing engineering mitigation, the route to competence for drivers continues to evolve, and human performance needs consistent and sustained support.
Overspeeding may arise from many factors, including unclear or late communication of speed restrictions, momentary lapses in situational awareness, or skills fade following periods away from driving. Route knowledge remains a vital part of safe train operation. RAIB investigations, such as those covering the incidents at Spital Junction in Peterborough, repeatedly show that the erosion of route knowledge can have significant consequences.
Whether caused by prolonged absence, unfamiliarity, or infrequent operation over specific lines, this decline can undermine a driver’s ability to anticipate speed changes, recognise key route features, and correctly interpret route indications.
In several cases, drivers did not receive timely updates on temporary or emergency speed restrictions or misinterpreted route signage, contributing to derailments.
These patterns highlight that competence is not static; it must be actively maintained. Knowledge can degrade when exposure to specific routes, operational contexts, or unusual conditions becomes limited. Where structured reinforcement is lacking, the risks include procedural drift, erosion of confidence, slower recognition of hazards, and a potential increased in the likelihood of operational errors.
Corporate knowledge further reinforces these lessons. Greg Morse’s reflections on railway incidents show how inadequate route knowledge, weak safety‑critical communication processes, and misaligned resourcing can combine to create significant operational failures. These cases show that technology alone cannot eliminate the risk. Embedding clear communication, a proactive route‑to‑competence approach, appropriate resourcing, and effective safety leadership into everyday operations remains central to controlling risk.
Collectively, these insights underscore the continuing need for a holistic approach to overspeeding risk. This approach must integrate engineering measures with strong operational competence, high‑quality route learning, and sustained human engagement.
Only through consistent reinforcement of knowledge and robust oversight can the industry ensure that overspeeding remains effectively controlled. Furthermore, a clear understanding of human performance characteristics, including both strengths and limitations, is crucial to mitigate iits role as a precursor to more serious events.
Every overspeed incident is now investigated not only for direct causes but also for wider systemic learning. The new standard (RIS‑3772‑TOM) published by RSSB strengthens this approach by setting out clear guidance on designing, identifying, implementing, and communicating speed restrictions. It also encourages the management of overspeed events through proactive detection, monitoring, and investigation.
Alongside this, the industry is investing in research such as the use of train describer data to automatically detect overspeeding and studies into the effectiveness of late notices for communicating speed restrictions.
These developments reinforce that managing overspeeding risk relies on continuous improvement, combining robust systems, evolving engineering solutions, and sustained support for the human element at the heart of safe railway operations.
