A yellow diamond sign shows the road funneling into a narrower bridge outline. What is the sign telling you?
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A.
The bridge deck freezes before the roadway
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B.
The bridge is closed to through traffic today
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C.
A weight limit applies to the bridge ahead
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D.
An approaching bridge has a narrow roadway Correct
The answer is "An approaching bridge has a narrow roadway"
The narrow bridge sign warns you that an approaching bridge has a narrow roadway, generally two feet less than the approach pavement. Answer A, 'the bridge deck freezes,' is the trap: drivers who remember the old winter-driving line about icy bridge decks pick it, but that hazard has its own dedicated sign and this one covers width, not surface temperature.
The traps in the wrong answers
A. The bridge deck freezes before the roadway
The bridge-freezes warning has its own dedicated sign; this one covers width, not surface temperature. This answer falls back on the common winter-driving warning about icy bridge decks, which the manual assigns to a different sign entirely.
B. The bridge is closed to through traffic today
Closure notices appear on temporary orange signs at the closure, not on permanent yellow warnings. This answer reads a bridge symbol paired with a warning shape as a service outage rather than a design detail.
C. A weight limit applies to the bridge ahead
Weight limits appear on regulatory signs at the bridge, not on a yellow warning diamond in advance. This answer confuses the shape of a narrowing road with the pounds-per-axle notice that a bridge posts on 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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