What does unpaved road mean?

[LeLily]

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