Where are you most likely to see several yellow change-in-direction warning signs posted one after another?
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A.
On the outside of a sharp curve Correct
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B.
At the end of a passing zone
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C.
Along the shoulder of a straight highway
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D.
Inside a downtown business district
The answer is "On the outside of a sharp curve"
Change-in-direction signs are posted several times along the outside of a sharp curve to keep the driver's eye on where the road is turning, and again on approaches to a narrow bridge. Answer C, 'along the shoulder of a straight highway,' is the trap: drivers who borrow from the delineator posts that stripe an interstate edge pick it, but the sign is a directional warning that appears only where the road is changing direction or narrowing.
The traps in the wrong answers
B. At the end of a passing zone
The end of a passing zone is marked by pavement lines, not by directional warning signs. This answer confuses the arrow-pattern chevrons with the pennant that marks a passing zone, since both use yellow.
C. Along the shoulder of a straight highway
A straight highway has no direction change to warn about; the signs appear only where the road turns or narrows. This answer borrows from the delineator posts that stripe an interstate edge and treats those markers as change-in-direction signs.
D. Inside a downtown business district
Downtown districts use guide and regulatory signs, not curve-warning arrows. This answer places the sign in the setting where the driver most often sees arrow-shaped signage, ignoring the manual's actual placement rule.
This question tests your knowledge of Warning Signs in Illinois. Source: Illinois Rules of the Road, "Warning Signs," p.72..
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