What is the purpose of grading in highway construction?

Grading in highway construction is a crucial step aimed at preparing the land for the installation of roads by ensuring a level surface. This process involves shaping and leveling the ground to create a stable foundation that can support the road surface and the loads it will bear. Proper grading helps in managing water drainage, which is essential to prevent erosion and water pooling on the road. It ensures that the road will be structurally sound and can handle traffic safely and efficiently. By achieving the correct slope and elevation, grading also facilitates proper alignment and geometry of the roadway, enhancing its overall functionality and longevity.