According to the manual, which statement about a vertical traffic light is correct?
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A.
Yellow is at the top
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B.
Red is at the top Correct
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C.
Green is at the top
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D.
Red is on the left
The answer is "Red is at the top"
The manual places red at the top of a vertical signal, with green at the bottom. Answer D takes the horizontal red-on-the-left rule and applies it to a signal the manual stacks top-to-bottom.
The traps in the wrong answers
A. Yellow is at the top
Yellow sits in the middle of a vertical signal, not the top. This answer slots yellow at the top on the assumption that the caution color must lead the stack as a warning to drivers.
C. Green is at the top
Green sits at the bottom of a vertical signal, not the top. This answer flips the top-to-bottom order because 'go' feels like it should sit up top where drivers look first.
D. Red is on the left
Red on the left is the horizontal-arrangement rule, not the vertical arrangement the question asks about. This answer takes the separate horizontal-arrangement rule and applies it to a vertical signal that stacks top-to-bottom.
This question tests your knowledge of Traffic Lights in Pennsylvania. Source: Pennsylvania Driver Manual, "Signals," p.7..
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