School Zones, Railways & Work Areas
When does the speed limit on this sign apply?
- AWhen you can see children near the road or the school.
- BWhen a stopped school bus ahead has its red lights flashing.
- CWhile the yellow lights mounted with the sign are flashing.
- DFrom sunrise to sunset on days when school is open.
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Correct answer: C. While the yellow lights mounted with the sign are flashing.
Why
This sign sets a lower school speed limit of 20 for the times when its yellow lights flash, usually before and after school. When the lights flash, keep to 20 or less and watch for children. When the lights are dark, the normal posted limit applies. Other school speed limit signs work in other ways: a plaque with times applies during those times, and a WHEN CHILDREN ARE PRESENT plaque applies when children are there.
Why the other answers are not correct
- A. Wrong: that is the rule for a plaque that says WHEN CHILDREN ARE PRESENT, not for this sign.
- B. Wrong: WHEN FLASHING refers to the yellow beacon that is mounted with this sign, not to the lights of a school bus.
- D. Wrong: times of day are shown on a separate time plaque; this sign works with flashing lights.
Verified against Manual on Uniform Traffic Control Devices for Streets and Highways, 11th Edition with Revision 1 · Section 7B.05 School Speed Limit Signs and Plaques · p. 1019, 1021
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