Sleepy driving is a serious problem that can lead to car crashes. Sleepiness causes motor vehicle accidents because it impairs concentration and can lead to the driver falling asleep at the wheel.
Important aspects of driving impairment associated with sleepiness are reaction time, vigilance, attention, and information processing. The exact prevalence is not known in Singapore. Sleepiness-related crashes is an under-recognised problem and may be categorised as fatigue and inattention.
Although society today gives sleep less priority than other activities, sleepiness and performance impairment are responses of the human brain to sleep loss/ deprivation. There is currently nothing that can reduce the human need for sleep. Microsleeps, or involuntary intrusions of sleep or near-sleep, can overcome even the best intentions to remain awake.
A typical crash related to sleepiness has the following characteristics:
To prevent sleepy driving and its consequences, you need to know the benefits of behaviours that help you avoid becoming sleepy while driving.
A combination of these factors increases crash risk substantially.
Sleepiness leads to accidents because it impairs human performances that are critical to safe driving.
People can use physical activity and dietary stimulants to cope with sleep loss and mask their level of sleepiness. However, when they sit still to perform repetitive tasks like driving, sleep comes quickly.
Sleepiness leads to:
The Epworth Sleepiness Scale (ESS) is an eight-item, self-report measure that quantifies individuals’ sleepiness by their tendency to fall asleep ’in your usual way of life in recent times’ in situations like sitting and reading, watching TV, and sitting in a car that is stopped for traffic.
People with a score between 10 to14 are considered moderately sleepy, whereas a score of 15 or greater indicates severe sleepiness.