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First Night Shifts: Guidance for Managing Fatigue Risk

An investigation into an incident where a train driver may have fallen asleep on the first night of his shift highlighted an ongoing debate within the scientific and rail industry communities. Does fatigue increase or decrease as people work through a series of night shifts? And what steps can organisations take to reduce fatigue risk on the first night shifts?

​The investigation into the 2010 freight train roll-back incident at Shap looked at tools that assess rosters for fatigue. It found that different tools made different predictions about fatigue based on assumptions about whether people adjust to night shifts and experience less fatigue over time, or whether they are likely to become increasingly tired over consecutive days. If a person’s body clock is adjusted to being awake during the day and asleep at night they will struggle to stay alert during their first few night shifts. In addition, if a person adopts their normal daytime routine leading up to their first night, by the end of that shift they will have been awake for a very long time. And we know that when people have been awake for 17 hours they start to show signs of impairment that are similar to being over the drink-drive limit.  

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Get in touch with our Principal Human Factors Specialist for further information.
Dan Basacik
Tel: 020 3142 5633
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