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Survey Sample and Loughborough University Bus Driver Fatigue Study

Questions to the Mayor of London – answered on 23rd September 2019.

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Photo of Keith Prince Keith Prince Conservative

Page 83 of the Fatigue Study reveals that about 5.4% (1353 of about 25000) of TfL Bus Drivers bothered to complete the Loughborough Bus Driver Fatigue Study. Do you feel that this sample size reflects a statistically-valid sample upon which to make policy? Since this small sample size represents less than 10% of Unite the Union’s stated membership of London’s Bus Drivers, does this low turnout constitute Unite the Union’s “work” both TfL and you are praising?

Photo of Sadiq Khan Sadiq Khan Mayor of London

This is a statistically significant sample size on which to base a plan of action, and that is what Transport for London, its bus operators and Unite the Union set out to achieve. The independent research was also backed by other sources of data such as on-road observations, manager interviews, driver focus groups and a literature review.

Please also see my response to Mayor's Question 2019/17465.