Illinois law requires a vehicle horn that can be heard from at least what distance?
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A.
200 feet Correct
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B.
300 feet
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C.
500 feet
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D.
50 feet
The answer is "200 feet"
The horn on your vehicle must be audible from 200 feet. A driver who picks 500 feet is reaching for the taillight visibility rule printed a few entries above the horn entry in the same equipment list.
The traps in the wrong answers
B. 300 feet
This answer reaches for the turn-signal visibility distance from the same equipment section. It substitutes the 300-foot turn-signal visibility figure for the horn distance.
C. 500 feet
This answer applies the taillight visibility figure to a rule about how far the horn must be heard. It reads the 500-foot taillight-visibility rule as if it also set the horn audibility threshold.
D. 50 feet
This answer uses the license-plate-light visibility figure rather than the horn requirement. It confuses the 50-foot license-plate-light distance with the horn audibility rule.
This question tests your knowledge of Vehicle Equipment in Illinois. Source: Illinois Rules of the Road, "Chapter 12: Equipment For Safe Driving - Required Equipment - Horn," p.92..
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