Road signs - Temporary road works The road signs have been grouped into 11 categories These are: Regulatory Signs Warning Signs Class A Signs Class B signs Class C Signs Information Signs Directional Signs Temporary Signs Traffic Signals Police Signals Carriage Way Markings Bend to the right sign Road affected by road works Curve alignment Heavy Vehicles Layout of lanes ahead Layout of lanes ahead Traffic lights ahead Pedestrian detour pedestrian detour in the indicated direction Narrow road ahead Road works ahead Supplementary plate Temporary speed sign Entry to works area