Driver's License Test Prep
Pennsylvania Practice Speed Limits

When does the 15 mph school zone speed limit apply?

  1. A.
    When the yellow signals flash or during the posted time periods Correct
  2. B.
    Only when children are visible walking near the road
  3. C.
    Only when a crossing guard is directing traffic
  4. D.
    Only during regular school hours from morning to afternoon
The Why

The answer is "When the yellow signals flash or during the posted time periods"

The 15 mph school zone limit applies when the yellow signals on the sign are flashing or during the time periods printed on the sign. It does not depend on visible children, regular school hours, or a crossing guard. Choice D reads the school zone as a fixed school-day window rather than a signal-triggered or time-posted zone.

Why the others miss

The traps in the wrong answers

B. Only when children are visible walking near the road

The limit is triggered by the signals or the posted times, not by whether children happen to be visible. This answer waits for a visible child before slowing, missing the flashing-signal and posted-time triggers the manual sets.

C. Only when a crossing guard is directing traffic

The crossing guard's presence is not the trigger; the flashing yellow signal or posted time is. This answer ties the school zone limit to a visible crossing guard rather than the sign's flashing or time-posted activation.

D. Only during regular school hours from morning to afternoon

The 15 mph limit is not tied to fixed daytime school hours; the flashing signals or the sign's posted times are what trigger it. This answer reads the school zone as a fixed school-day window rather than a signal-triggered or time-posted zone.

The Rule

This question tests your knowledge of Speed Limits in Pennsylvania. Source: Pennsylvania Driver Manual, "School Zone Signals," p.9..

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