What does the crown refer to in road construction?

In road construction, the crown refers to the slight curvature or slope from the centerline of the roadbed to the outside shoulders. This design feature is crucial as it facilitates proper drainage of surface water, preventing it from pooling on the roadway and eliminating the risk of hydroplaning or water-related accidents. By sloping the surface, water is directed toward the edges of the road, allowing it to flow away from the driving surface and into drainage systems or adjacent landscapes. This effective management of water is essential for maintaining the integrity and safety of the roadway over time.

Understanding the purpose and function of the crown is vital for ensuring optimal roadway performance and longevity. The other options, while they reference important aspects of road construction, do not accurately capture the specific definition of the crown.