<P> The national speed limit is 70 mph ( 112 km / h ) on motorways , 70 mph ( 112 km / h ) on dual carriageways , 60 mph ( 96 km / h ) on single carriageways and generally 30 mph ( 48 km / h ) in areas with street lighting ( restricted roads ) . These limits may be changed by road 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 . </P>
<P> The national speed limit is 70 mph ( 112 km / h ) on motorways , 70 mph ( 112 km / h ) on dual carriageways , 60 mph ( 96 km / h ) on single carriageways and generally 30 mph ( 48 km / h ) in areas with street lighting ( restricted roads ) . These limits may be changed by road 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 . </P>
national speed limit on a single carriageway uk
national speed limit on a single carriageway uk
60 mph
60 mph