A yellow warning sign shows a truck tilted downward on a slope. What does it warn about?
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A.
A truck rollover risk on wet pavement
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B.
A steep uphill grade is coming up
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C.
A runaway truck ramp is on the right
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D.
A dangerous hill on the road ahead Correct
The answer is "A dangerous hill on the road ahead"
The downgrade sign warns you of a dangerous hill that may be very long, steep, or feature sharp curves; slow your speed before starting down. Answer C, 'runaway truck ramp on the right,' is the trap: drivers who jump from the truck symbol to a memory of escape ramps on mountain descents pick it, but those ramps carry their own sign farther down the grade and this earlier warning names the hill itself.
The traps in the wrong answers
A. A truck rollover risk on wet pavement
Rollover risk on wet pavement is not what the downgrade sign covers; the sign names the grade, not the surface. This answer combines two hazards a driver associates with trucks and reads the sign as the more dramatic of the pair.
B. A steep uphill grade is coming up
The truck symbol tilts downward to show a descent, not a climb. This answer reads the tilted-truck picture as a climb because the driver expects every hill warning to be about going up.
C. A runaway truck ramp is on the right
Runaway truck ramps use their own sign posted at the ramp, not the general downgrade warning at the top of the hill. This answer jumps from the truck symbol to a ramp memory picked up on mountain descents, skipping the earlier warning about the hill itself.
This question tests your knowledge of Warning Signs in Illinois. Source: Illinois Rules of the Road, "Warning Signs," p.71..
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