What is the maximum speed on a dual carriageway?

Answer: B — 60 mph

A dual carriageway is a type of road designed for high-speed traffic with two separate carriageways, one for each direction. B 60 mph is the maximum speed limit on a dual carriageway in most parts of the UK. Option A: 50 mph is incorrect because it is the maximum speed limit on a single carriageway road. Option C: 70 mph and D: 80 mph are incorrect because they exceed the recommended speed limit on dual carriageways. It is important to follow speed limits for safety reasons and to avoid penalties.