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Presentation given by Yvonne Taylor at the 5th International Conference on Applied Human Factors and Ergonomics 2014 www.ahfe2014.org www.its.leeds.ac.uk/people/y.taylor
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Institute for Transport Studies FACULTY OF ENVIRONMENT
Shiftwork and Driver Fatigue
Yvonne Taylor, Dr Natasha Merat, Dr Samantha Jamson
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Background
• More than 3.5 million shift workers in the UK (Richbell and Chan, 2011)
• Fatigue causes serious and fatal collisions and ‘near miss’ incidents
• Sleepiness peaks are generally around 0300-0500 and 1400-1600 (Increases in fatigue related road traffic collisions between these times) (Horrocks and Pounder, 2006)
• Fatigue accounts for up to 20% of serious collisions on motorways and monotonous roads in Great Britain (Horne and Reyner, 1995)
• Education / awareness is of primary importance • Various countermeasures used by drivers (most only effective for short
periods, if at all) (Horne and Reyner, 1999)
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Driving Performance Risks
Driver Performance
Risks
Increased Risk
Fatigue-related
Countermeasures / mitigation attempts
Work Pressures
Lifestyle Factors
Driver Fatigue
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My Police Study
• 4 Police Forces in Yorkshire and
the Humber Region
• Over 500 responses, 492 fully completed
• 77.6% male, 22.4% female
• Age range 22 to 61 years
(letour.yorkshire.com)
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Lifestyle
238
240
242
244
246
248
250
252
Yes No
Num
ber
Yes/No
Do you feel that you sleep well?
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Mode of Transport
0
100
200
300
400
500
600
Walk Lift / Taxi Bus / Train Pedal Cycle Motorcycle Car Other
Num
ber
Mode of transport
How do you usually travel to / from work?
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Shifts
What shift causes the biggest problem with driver fatigue?
Earlies
Lates
Nights
Other
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Driving incidents Reported
• In the 12 months preceding the study, 5.8% stated they had been involved in a collision or road departure on the way to or from work
• 51.9% stated they had been involved in a ‘near miss’ such as a kerb strike, lane departure or almost had a collision
• 95.7% of these incidents happened on the way home from work
• 61.8% had been working a nightshift prior to the incident
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Future Study
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7
Day 8
Day 9
Day 10
RD RD RD RD 0700-1600
0700-1600
1400-0000
1400-0000
2200-0700
2200-0700
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Shift Pattern
Actigraphy
Date Sleep Start Time
Sleep End Time
Time in Bed
Sleep Efficiency
09-06-14 22:05 06:45 8hr 40 90 09-06-14
16:50 17:45 0hr 55 90
10-06-14
22:20 06:45 8hr 25 91
10-06-14
14:55 18:25 3hr 30 85
11-06-14
23:20 06:55 7hr 35 89
12-06-14
23:05 05:55 6hr 50 91
13-06-14
22:20 08:35 10hr 15 82
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Joggle Research
• Scientifically recognised cognitive tests
• Easily portable, tablet based
• Easy to access, store and retrieve cloud based data
• Simple to set up and run
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