Video narration
You're standing beside a dirt shortcut you walk every day. After rain, it is soft, uneven, and full of puddles. To turn that path into a road, workers first clear it and shape the route, giving water somewhere to run off instead of sitting on the way. Then they press the ground firm. They add strong supporting layers and pack those down too, building a steady base beneath the path. The exact layers and materials depend on the place and the road design. Here's the turn: the smooth surface isn't what makes a road strong. The work underneath does. Only after that does the paved surface go down. Finally, painted lines help guide people using the road. Your shortcut becomes a road from the ground up: a packed base carries the route, and a smooth finish completes it.