unpaved road; dirt road
Refers to a road without asphalt or concrete surface; often used in contexts like driving, cycling, or rural areas.
The road ahead becomes unpaved, so please drive carefully.
Part of the cycling course was a dirt road.
舗装道路 means 'paved road', the opposite of 未舗装路.
砂利道 specifically refers to a gravel road, which is a type of unpaved road.
Compound of 未 (mi, 'not yet') + 舗装 (hosō, 'paving') + 路 (ro, 'road').