Sri Lanka has an extensive road network for inland transportation. With more than  of paved roads, it has one of the highest road densities in the world ( of paved roads per every  of land). The road network consists of 35 A-Grade highways and four controlled-access highways. A and B grade roads are national (arterial) highways administered by Road Development Authority. C and D grade roads are provincial roads coming under the purview of the Provincial Road Development Authority of the respective province. The other roads are local roads falling under local government authorities.