Unmade road
A dirt road , even slopes , is a barely paved traffic route without a base that is not free of dust is made or kept.
In modern road construction, roads are usually given an asphalt surface over their substructure, which guarantees freedom from dust. Only roads paved or macadamized with gravel can be made dust-free by spraying a binding agent, in the simplest case this is water. On natural roads, on the other hand, there is no provision for dust clearance, which means that no further measures are necessary. Natural roads are therefore only very lightly paved and can be built without a substructure. One speaks of piste in particular when no structural measures are taken at all.
According to the definition in the Lower Austrian Road Act, a dirt road is a public road whose lane is not made dust-free for reasons of its low traffic significance or ecology.
source
- Lower Austrian Road Act 1999, § 4, number 4, PDF