Why do motorcycles easily disappear in vehicle blind spots?
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A.
They are smaller in size and harder to see Correct
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B.
Their brake lights are dimmer than most cars
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C.
They usually ride in the center of the lane
The answer is "They are smaller in size and harder to see"
Motorcycles are smaller in size and harder to see, so they easily disappear in vehicle blind spots. Choice B swaps the size rule for a lighting rule, the move a driver makes when they judge every vehicle's visibility by how bright its lamps look rather than by its profile.
The traps in the wrong answers
B. Their brake lights are dimmer than most cars
The manual pins blind-spot disappearance on motorcycles being smaller and harder to see, not on brake-light brightness. This answer trades the size rule for a lighting rule, judging visibility by how bright a vehicle's lamps look rather than by its profile.
C. They usually ride in the center of the lane
The manual gives size and visibility as the cause, not lane position. This answer carries over the safe-lane-position rule motorcyclists follow and reads it as the reason cars miss seeing them.
This question tests your knowledge of Defensive Driving in California. Source: California Driver Manual, "Sharing the Road: Motorcycles," p.44..
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