Department of Rural Roads

Department of Rural Roads (DRR) (กรมทางหลวงชนบท) is a department of the Thai government, under the Ministry of Transport. It maintains rural roads, under a different numbering scheme from national roads, which are managed by the Department of Highways (DOH), กรมทางหลวง, Krom Thang Luang).

Definition
The 1992 Highway Act (พระราชบัญญัติทางหลวง พ.ศ. 2535), revised as the 2006 Highway Act (พระราชบัญญัติทางหลวง (ฉบับที่ 2) พ.ศ. 2549), defines five highway types.

A rural highway (ทางหลวงชนบท) or rural road is a highway which the Department of Rural Roads constructs and maintains. Registration of rural highways is overseen by the director general of the DRR.

Road numbering
Rural road signs are gold-on-blue, with a two-letter provincial designation prefixed to the road number. Depicted is YS4011, a rural road in Yasothon Province. The rural road network measures some 35,000 km, about 82% of which is paved.