On school days, during what time period does the 20 mph school zone speed limit apply?
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A.
Between 7 a.m. and 3 p.m.
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B.
Between 6:30 a.m. and 4 p.m. Correct
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C.
Between 8 a.m. and 5 p.m.
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D.
At all hours on school days.
The answer is "Between 6:30 a.m. and 4 p.m."
The 20 mph school-zone limit runs from 6:30 a.m. to 4 p.m. on school days when children are present and signs are posted. Choice D is the trap: drivers carry over the construction-zone rule, which applies 24 hours a day, seven days a week, and assume school zones work the same way.
The traps in the wrong answers
A. Between 7 a.m. and 3 p.m.
The window opens before 7 a.m. and closes later than 3 p.m., because it protects arrival and dismissal traffic, not just the classroom day. This answer anchors the window on the classroom bell schedule instead of the wider drop-off and dismissal window the manual protects.
C. Between 8 a.m. and 5 p.m.
The window ends at 4 p.m., not 5 p.m., and it starts at 6:30 a.m., not 8 a.m. This answer stretches the closing time to a general after-school pickup hour and pushes the start to a standard 8 a.m. classroom bell.
D. At all hours on school days.
The 20 mph limit is capped at 6:30 a.m. to 4 p.m. on school days, not around the clock. This answer confuses the school-zone rule with the construction-zone rule, which the manual states applies 24 hours a day, seven days a week.
This question tests your knowledge of Speed Limits in Illinois. Source: Illinois Rules of the Road, "Speed Limits," p.24..
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