Who are the men who smoothed and flattened the road bed?

The men who smoothed and flattened the road bed are typically known as road workers or construction laborers. They often operate heavy machinery such as graders and rollers to prepare the surface for paving. Their work is crucial in ensuring a stable and even foundation for roads, contributing to the safety and durability of the infrastructure. In historical contexts, these workers could also include manual laborers using tools like rakes and shovels.