What is the purpose of a crowned road?

The purpose of a crowned road is primarily to allow for effective water drainage. The design of a crowned road features a slight elevation in the center, causing the surface to slope downwards towards the edges. This design helps rainwater to run off rather than pooling on the surface of the road, which can lead to hazardous driving conditions. Adequate drainage is essential for maintaining road safety by reducing the risk of hydroplaning and other water-related issues that could affect vehicle stability and control.

While other factors like smoothness, vehicle speed, and road friction play important roles in road design, they are secondary to the critical function of preventing water accumulation. Therefore, the crowned shape directly addresses drainage needs, making it a fundamental consideration in road construction and maintenance.