Mouth ulcers are also a possible symptom of a viral infection that mainly affects young children, called hand, foot and mouth disease. Speak to your GP or call NHS 111 if you're unsure. Read about the symptoms of hand, foot and mouth disease.
It was not until 1965 that a national upper limit of 70mph was introduced for all roads, including motorways. Since 1977 the speed limit for cars and motorcycles on dual carriageways has been 70mph, with a 60mph speed limit on single carriageways.
For information about the speed limits in your state, find your state on the speed limit map above or on the navigation bar. Since the national speed limit of 55 mph was abolished in 1994, most of the states have changed their maximum speed limits to reflect state laws.