Asleep at the wheel: Driving while drowsy can be deadly | Science| In-depth reporting on science and technology | DW | 01.10.2019
  1. Inhalt
  2. Navigation
  3. Weitere Inhalte
  4. Metanavigation
  5. Suche
  6. Choose from 30 Languages
Advertisement

Science

Asleep at the wheel: Driving while drowsy can be deadly

Falling asleep at the wheel can have dire consequences not only for drivers, but other road users. A recent study shows just who is at risk and what’s causing it.

Sleep deprivation combined with long haul trips are a common cause of truck accidents.

A new report suggests truck drivers across Europe are more likely to succumb to obstructive sleep apnea (OSA) as a result of not getting enough shut eye and living a sedentary lifestyle on the road.

Read more: Heart health and metabolism benefit from regular bedtime

Obesity is a main risk factor of OSA. Over 70% of participants in the European Lung Foundation study were reported to be overweight and as a result had sleep-related breathing problems. 

Difficult to detect

Narrowing of the throat interrupts normal breathing during sleep. As a result, the sleep cycle is disrupted — the body reacts by releasing adrenalin, forcing the pulse to rise. Snoring can be an indication of OSA. The irregular sleep pattern caused by OSA prevents a deep sleep, resulting in tiredness, a contributing factor of microsleep. 

Trucks lined up in a row

Truck accidents as a result of drivers falling asleep are quite common, Weess says

"Microsleep is difficult to detect," says Hans-Günter Weess, head of the sleep medicine department at the Pfalzklinikum in western Germany. Rapid blinking, yawning, tunnel vision and short-term memory loss are all signs, Weess adds.

Microsleep causes accidents

Between 30-50% of road accidents in Germany are caused by truck drivers who fall asleep momentarily at the wheel, the Intersom Cologne center for sleep, medicine and research reports.

Read more:Sleep Deprivation and its Consequences

These are the most serious accidents, Weess remarks, because "the driver doesn't realize what is happening and cannot react."

"Deadly accidents due to sleep deprivation happen quite frequently — perhaps twice as often as accidents as a result of drunk driving," Weess added. 

Regulatory prevention

European Union legislation allows truck drivers to drive for a total of nine hours a day. After four and a half hours of driving, truckers are required to take a 45 minute break. Between each nine-hour driving period, they must rest for 11 hours.

Since 2014, EU regulations acknowledge OSA as a high risk factor for motor vehicle accidents.

Read more:  How to look after your mental health

Still, the monotony of driving and little room for movement gives way to sleepiness.

New regulations proposed by the European Parliament this year go one step further in trying to ensure drivers get the sleep they need. At the end of their 6-day working week, truckers are required to book into a hotel and rest for 45 hours before resuming work. 

Companies must also ensure drivers return to their home countries at least once every month. 

Watch video 00:45

Are you getting sufficient sleep?

DW recommends

Audios and videos on the topic

Advertisement