While operating a motor vehicle at night, an impaired driver tends to fixate straight ahead on the road and fails to notice a pedestrian stepping onto the crosswalk from the side shoulder. Which physiological effect of alcohol directly accounts for this critical safety hazard?
- Narrowing of the driver's peripheral vision, leading to a restricted visual field often described as 'tunnel vision'Answer
- BFailing to conduct a shoulder check due to incorrect reliance on side mirrors alone
- CAssuming legal driving ability as long as blood alcohol concentration remains below statutory limits
- DMisjudging posted safe driving speeds under basic speed law regulations
Answer
Narrowing of the driver's peripheral vision, leading to a restricted visual field often described as 'tunnel vision'
Alcohol acts as a central nervous system depressant that degrades sensory processing. One of its primary physiological impacts on vision is the restriction of peripheral vision (side vision), causing 'tunnel vision.' As a result, impaired drivers lose the ability to detect hazards approaching from the sides without turning their head completely.
Step-by-Step Solution
Key Concept
Effect of alcohol on peripheral vision and visual field width
Estimated Time:1m 0s