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.
In 1987, Congress allowed the states to increase highway speed limits from 55 to 65 mph, but it would take another 21 years for the EPA to adopt tests that provide more realistic projections. To accomplish this, the EPA added three additional test cycles to the original two for 2008 model-year cars.