When must drivers obey the posted speed limit in an Illinois construction zone?
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A.
24 hours a day, seven days a week Correct
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B.
Only when workers are visible in the zone
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C.
Only during posted daylight hours
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D.
Only on weekdays during business hours
The answer is "24 hours a day, seven days a week"
Construction zone speed limits apply every hour of every day in Illinois, whether workers are on site or not. B picks off drivers who tie slowing down to the sight of a hard hat; the manual explicitly rejects that habit.
The traps in the wrong answers
B. Only when workers are visible in the zone
The manual specifies the limit applies whether workers are present or not. This answer ties the speed rule to the sight of a hard hat rather than the posted sign.
C. Only during posted daylight hours
The manual does not limit construction zone speeds to daylight. This answer assumes speed rules follow the sun rather than the round-the-clock schedule the manual sets.
D. Only on weekdays during business hours
The manual does not restrict the rule to business hours. This answer applies an office-hours habit to a rule that runs at all times.
This question tests your knowledge of Speed Limits in Illinois. Source: Illinois Rules of the Road, "Construction Zones," p.25..
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