A yellow warning sign shows the pavement edges pinching inward on both sides. What is it telling you?
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A.
A lane must merge to the right ahead
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B.
A shoulder drop-off runs along the road
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C.
A two-lane road suddenly narrows ahead Correct
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D.
An approaching bridge has a narrow roadway
The answer is "A two-lane road suddenly narrows ahead"
The Road Narrows sign tells you that a two-lane road suddenly narrows; the pavement edges taper in but the road stays open on both sides. Drivers who read every narrowing symbol as a bridge warning pick D, carrying over the Narrow Bridge sign as if it covered any tapered pavement.
The traps in the wrong answers
A. A lane must merge to the right ahead
A merge to the right is shown by the Merging Lanes sign, not by symmetric narrowing on both sides. This answer treats every road-shape warning as a merge cue, borrowing from the more common Merging Lanes sign.
B. A shoulder drop-off runs along the road
Shoulder drop-offs have their own warning; the Road Narrows sign shows pavement edges tapering, not the shoulder dropping away. This answer reads any warning about pavement edges as a drop-off, a familiar rural hazard drivers already brace for.
D. An approaching bridge has a narrow roadway
The Narrow Bridge sign warns of an approaching bridge with a narrow roadway, which is a different sign from Road Narrows. This answer assumes any tapered symbol points at a bridge, borrowing the Narrow Bridge sign's premise where it doesn't apply.
This question tests your knowledge of Warning Signs in Illinois. Source: Illinois Rules of the Road, "Warning Signs, Road Narrows," p.71..
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