Traffic prevents you from changing lanes to move over for a clearly marked disabled vehicle on the shoulder. What does the Move Over Law require?
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A.
Slow to at least 20 mph below the posted limit Correct
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B.
Stop and wait for the disabled vehicle to move
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C.
Reduce your speed to 10 mph below the posted limit
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D.
Maintain the posted speed limit
The answer is "Slow to at least 20 mph below the posted limit"
The Move Over Law's primary duty is to shift into a nonadjacent lane when passing an emergency response area or clearly marked disabled vehicle on the shoulder. Where traffic prevents that, the manual requires slowing to at least 20 mph below the posted limit. The 10-mph figure in C substitutes the informal courtesy of easing off around a stopped vehicle for the specific cut the rule spells out.
The traps in the wrong answers
B. Stop and wait for the disabled vehicle to move
The Move Over Law asks for a speed reduction, not a full stop, when you cannot change lanes. This answer applies the pull-over-and-stop rule for an approaching emergency vehicle to a disabled vehicle already parked on the shoulder.
C. Reduce your speed to 10 mph below the posted limit
The manual sets the required cut at least 20 mph below the posted limit, not 10. This answer confuses the mandated cut with the informal 10-mph reduction many drivers ease into around stopped vehicles, understating the specific figure the manual writes into the rule.
D. Maintain the posted speed limit
Maintaining the posted limit is exactly what the law forbids when you cannot move over. This answer half-remembers the Move Over Law as a lane-change rule only and forgets the speed-cut fallback that applies when traffic blocks the move.
This question tests your knowledge of Speed Limits in Pennsylvania. Source: Pennsylvania Driver Manual, "Move Over Law," p.59..
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