Why is speed management important when taking curves in a CMV?

• A. To prevent loss of control or rollover due to high center of gravity.
• B. To save fuel.
• C. To reduce tire wear.
• D. To prevent engine overheating.

Answer: (A)

Controlling speed in curves is crucial because a CMV carries a heavy load high above the road, giving it a high center of gravity. In a turn, centrifugal force pushes the truck outward. If you go too fast, that outward push can cause loss of steering control or, worse, a rollover, since the weight shifts toward the outside tires and can lift the inside wheels. Slowing down before entering the curve and keeping a steady, controlled speed helps the tires maintain grip, keeps the vehicle stable, and greatly reduces the risk of exiting the turn uncontrollably.

Saving fuel or reducing tire wear can be influenced by smooth driving, but they aren’t the primary safety concern in curves. Engine overheating isn’t typically caused by taking curves at the wrong speed. The main danger in curves comes from losing control or rolling over due to the vehicle’s high center of gravity.