Effect of Alcohol on Driving Skills

Effect of Alcohol on Driving SkillsVisual functions

Even small doses of alcohol may cause longer eye fixation time, tunnel vision and defective attention switching.

The response time of both eye movement and accommodation may be lengthened and there is a significant reduction in tolerance to glare from the headlights of oncoming vehicles.

Information processing

Even with low blood alcohol concentrations, when more than one form of information input is presenting itself at one time the rate of processing is depressed significantly.

Alcohol impairs impulse conduction and transmission in the central and peripheral nervous systems; rapid information analyses and processing is delayed and this in turn delays prompt and appropriate decision making.

Judgement

Behaviour, judgement, self-control and depth of thought are affected with associated impairment of reaction times, accuracy of response speed judgement, and performance awareness.

Restraint and impulse

Alcohol disturbs the balance between restraint and impulse, frequently resulting in impulsive behaviour.

Muscular response

Alcohol produces a tendency to veer over the centre of the road and to take much longer to correct such a steering error; furthermore, even with low blood alcohol concentration levels, drivers tend to make too little or too much movement in negotiating corners.

High alcohol concentrations in the blood also increase the time required to apply the brakes as well as reducing the degree of control in the actual use of the brakes.

Also View:

Drunk Driving and Road Safety

Young Impaired Drivers / Young Drunk Drivers and Road Safety

South Africans Against Drunk Driving (SADD)

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