"''To construct, execute, carryout, improve, work, develop, administer, manage, control or maintain in Bihar and elsewhere all types of roads, highways, express routes, paths, streets, bridges, sideways, tunnels and other infrastructure , works and conveniences, approach road, sheds, temporary dwelling huts in case of calamity or any emergency pertaining to all departments of Government of Bihar or any other department, agency, organization or body through Road Construction Department or directly.''"