Duties and Functions To plan, design and supervise the construction of roads, intended to be classified as motorways and main roads;To carry out or cause to be carried out the upgrading of motorways and main roads and their routine and periodic maintenance;To maintain existing bridges, tunnels and associated works on motorways and main roads;To plan, design and supervise the construction and reconstruction of bridges, tunnels and associated works on motorways and main roads;To advise the Minister on the formulation of a road development policy;To advise the Minister on the management policy of roads;To prepare and implement road development schemes;To conduct and coordinate research and investigation on materials required for road construction;To control the display of advertisements along or visible from motorways and main roads;To regulate undertakers’ works in relation to motorways and main roads.