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Difficulty: HardMotorcycles

When waiting to turn right across an oncoming lane of traffic, an approaching motorcycle is frequently misjudged as being further away and travelling slower than a car moving at the identical speed and distance, due to its narrower visual profile.

Answer: Answer

Answer

True. The narrower frontal profile of a motorcycle creates a visual illusion where approaching speed and proximity are easily underestimated by drivers waiting to turn at junctions.
The statement is correct because the smaller silhouette of a motorcycle reduces the optical expansion cues that human eyes rely on to judge approaching speed and gap distance. According to Highway Code Rule 211, drivers must take special care when emerging from or turning at junctions because the speed and distance of motorcycles are deceptively difficult to judge.

Step-by-Step Solution

1
Analyze the physical and visual characteristics of a motorcycle relative to oncoming traffic.
A motorcycle has a much narrower frontal width (typically under 1 metre) compared to a passenger car (around 1.8 metres).
Vehicle width directly determines how rapidly an oncoming object appears to grow in a driver's field of vision.
2
Apply the principles of visual perception and the 'size-arrival effect' at road junctions.
Smaller, narrower objects produce smaller retinal image expansion rates, causing human observers to perceive them as moving slower and being further away than larger vehicles travelling at identical velocities.
The Highway Code (Rule 211) highlights that drivers must take extra care at junctions specifically because it is difficult to judge the speed and distance of approaching motorcycles.
3
Conclude whether the statement accurately reflects road safety theory and Highway Code principles.
The statement is definitively true.
Perceptual underestimation of motorcycle speed and proximity is a primary cause of right-turn junction collisions.

Key Concept

Perceptual estimation of motorcycle speed and distance at junctions
Estimated Time:45s
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Topics

Motorcycles

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