The speed limit is 70 mph (112km / h) on motorways, 70 mph (112km / h) on dual carriageways, 60 mph (96km / h) on single carriageways and 30 mph (48km / h) in areas with street lighting (restricted roads). These limits may be reduced by roadside signs and apply to cars, motorcycles, car - derived vans up to 2 tonnes maximum laden weight (MLW), and to motorhomes or motor caravans not more than 3.05 tonnes maximum unladen weight. Other classes of vehicles are subject to lower limits on some roads.
what is the national speed limit on single carriageway
60 mph (96km / h)