What does unpaved road mean?

[LaLeilani]

Generally refers to roads other than Class A or Class B highways. Below is more information about unpaved roads: 1. Introduction: Unpaved roads are those without surface materials like slabs or concrete bricks, directly consisting of concrete surfaces, asphalt roads, or even dirt roads, gravel roads, etc. 2. Paved roads: Unpaved roads are defined in contrast to paved roads. Paved roads with a thickness of 2.5~4cm are a widely used road structural layer, typically serving as the wearing course for multi-layer asphalt surfaces, thin overlays in maintenance and repair, and pavement for bridge decks.