@designexpertint: What's under the asphalt: subgrade, subbase and base, each layer spreading the load. On top, the crown sheds water into the ditches, culverts carry it to the other side, and on curves the superelevation keeps you in your lane. At night, reflective road studs and guardrails guide the way. 🌙 Which layer didn't you know about? Tell us 👇 #civilengineering #pavement #RoadDesign #highways #construction