Roadbed



noun
1.
(the foundation structure of a railroad, bed or foundation for the rails and ties of a railroad; sometimes, the surface of such a road) គ្រឹះថ្នល់
ENGLISH MEANING
noun
1.
In railroads, the bed or foundation on which the superstructure (ties, rails, etc.) rests; in common roads, the whole material laid in place and ready for travel.