Covering a road is a process known as paving. Paving involves laying down a layer of asphalt or concrete over the existing road surface in order to create a smoother, more durable surface. This process is often used to repair roads that have become damaged due to wear and tear, or to improve the safety of a road by reducing the risk of potholes and other hazards. Paving is an important part of maintaining roads and ensuring they are safe for drivers and pedestrians.