A yellow diamond sign shows a car with wavy tracks behind its tires. What does it warn?
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A.
The pavement is unusually slick when wet Correct
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B.
The road floods regularly during heavy rain
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C.
The shoulder ahead is loose gravel
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D.
The lane has been recently repaved
The answer is "The pavement is unusually slick when wet"
The Slippery When Wet sign warns that the pavement ahead is unusually slick when wet, even in light rain. It is a hazard warning, not a notice about flooding, shoulder type, or recent paving work. On a slick surface you should reduce speed and increase your following distance.
The traps in the wrong answers
B. The road floods regularly during heavy rain
Flooding hazards are posted with separate signs, not the wavy-track symbol. Misreading: Confuses a slick-surface warning with a standing-water or flooding warning; the manual ties this sign only to pavement that is slick when wet.
C. The shoulder ahead is loose gravel
Loose gravel uses its own warning sign with a different symbol. Misreading: Misreads the wavy-track symbol as a gravel or shoulder hazard; the manual assigns this sign to slick pavement, not shoulder surface type.
D. The lane has been recently repaved
Recent paving is signed with orange work-zone notices, not yellow warnings. Misreading: Treats a yellow warning sign as a work-zone or construction notice; the manual lists this yellow diamond as a slick-pavement warning, not a paving advisory.
This question tests your knowledge of Warning Signs in Oregon. Source: Oregon Driver Manual, "Warning Signs," p.12..
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