Crossfall of carriageway – definition of camber In highway cross-section terminology, the convexity provided from the crown to the edges of the pavement to facilitate drainage is called:

Introduction / Context:Water must be drained quickly from the pavement surface to avoid skidding, hydroplaning, and moisture damage. The designed crossfall (crown-to-edge slope) is a simple geometric feature that achieves this across all pavement types.

Given Data / Assumptions:

• A crowned carriageway with edges lower than the centerline.
• Use of standard road crossfall terminology.

Concept / Approach:Camber is the intentional transverse slope from the crown toward the edges to shed water. It differs from super-elevation, which is a purposeful banking of the cross-section on horizontal curves to counteract centrifugal effects.

Step-by-Step Solution:Identify the function: drainage under rainfall.Recognize geometric form: convex surface, crown at center.Terminology: this is called camber (not super-elevation).

Verification / Alternative check:Standard drawings show typical camber values by surface type: earth roads have higher camber; bituminous and concrete have moderate camber.

Why Other Options Are Wrong:Super-elevation addresses lateral acceleration on curves; “height of pavement” is not a standard term for crossfall.

Common Pitfalls:Confusing camber with super-elevation; specifying excessive camber causing driver discomfort or excessive edge wear.

Final Answer:camber