The purpose of camber (cross slope) on a road is:
Choose the correct answer
To increase the sight distance
To drain rainwater off the road surface laterally and protect the pavement
To allow vehicles to turn at intersections
To resist uplift forces on bridge decks
Correct Answer
B. To drain rainwater off the road surface laterally and protect the pavement
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Camber drains rainwater off the road surface laterally toward drains, preventing accumulation of water that causes softening of subgrade, skidding, and rutting. Typical camber: 2–3% for bituminous surface, 1.7–2.5% for concrete, 3–4% for gravel. Camber is the transverse slope across the road width.
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