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Difficulty: EasyBalance and Center of Gravity

A commercial motor vehicle carrying freight with a high center of gravity has an increased rollover risk and can tip over on curved highway ramps even when driven at the posted speed limit.

Answer: Answer

Answer

True
The statement is true because elevating a vehicle's center of gravity reduces lateral stability and drastically increases the risk of rollover. Posted curve and ramp advisory speeds are designed for passenger cars with low centers of gravity, meaning commercial vehicles with top-heavy loads can roll over even when traveling at or below the posted limit.

Step-by-Step Solution

1
Analyze how cargo height affects the vehicle's center of gravity and lateral stability.
Higher cargo placement elevates the overall center of gravity, increasing centrifugal tipping forces during cornering.
Center of gravity height determines the vehicle's resistance to sideways tilting forces.
2
Evaluate posted curve and ramp speed limits in relation to top-heavy commercial vehicles.
Posted speed limits are engineered for standard passenger cars; commercial trucks with high centers of gravity can roll over at or below these speeds.
Drivers transporting high-profile or top-heavy freight must reduce speed significantly below posted advisory ramp limits.

Key Concept

Impact of a high center of gravity on commercial vehicle rollover risk in curves and ramps.
Estimated Time:30s
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Topics

Balance and Center of Gravity

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