Which road design has the middle higher than the sides?

• A. Banked curve
• B. Center of gravity
• C. Visual lead time
• D. Crowned road

Answer: (D)

The idea being tested is cross-section design: a crowned road has the center raised higher than the edges. This slight mound from the middle to the sides creates a cross-slope that directs rainwater toward the shoulders, helping the surface dry faster and reducing the risk of hydroplaning. The crown is chosen to be gentle so it doesn’t affect steering or comfort, while still providing effective drainage and traction.

Other concepts aren’t about the pavement’s shape from side to side. A banked curve tilts the road along the curve to aid turning, not the vertical cross-section. The center of gravity refers to the balance point of an object, not road construction. Visual lead time is about how far ahead you need to see to react safely, not the road’s surface profile. So the design where the middle sits higher than the sides is the crowned road.