A yellow diamond sign shows a truck tipping. What does the manual say this sign identifies?
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A.
Curves where trucks at excessive speeds have a potential to rollover Correct
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B.
Steep grades where trucks should shift into a lower gear
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C.
Weigh stations for commercial vehicles ahead
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D.
Areas where trucks are prohibited from the roadway
The answer is "Curves where trucks at excessive speeds have a potential to rollover"
The manual says the truck rollover sign identifies curves where trucks traveling at excessive speeds have a potential to rollover. Learners often confuse it with the HILL/DOWNGRADE warning shown two entries later, which is the sign that actually tells drivers to shift to a lower gear on a steep grade.
The traps in the wrong answers
B. Steep grades where trucks should shift into a lower gear
The tipping-truck symbol points to a rollover risk on curves, not to a hill requiring a lower gear. This answer confuses this warning with the HILL/DOWNGRADE sign shown two entries later, which is the sign that actually tells drivers to shift to a lower gear on a steep grade.
C. Weigh stations for commercial vehicles ahead
This is a yellow diamond warning sign about crash risk on curves, not a guide sign directing trucks to weigh stations. This answer treats any truck symbol on a road sign as a service-facility notice, though yellow diamonds warn of roadway hazards rather than list facilities.
D. Areas where trucks are prohibited from the roadway
The sign warns trucks of a rollover risk on curves; it does not ban them from the road. This answer reads a tipping-truck symbol as a prohibition, though vehicle bans are posted on white regulatory signs rather than yellow warning diamonds.
This question tests your knowledge of Warning Signs in Pennsylvania. Source: Pennsylvania Driver Manual, "Warning Signs - Truck Rollover," p.14..
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