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.
Beginning with the National Traffic and Motor Vehicle Act of 1966, the United States has required automobiles to have safety features such as seatbelts. By the early 1990s, all new cars sold in the United States were equipped either with automatic seat belts or with air bags that inflate upon impact. In 1973-74 the US Congress, attempting to reduce fatalities and conserve fuel, passed a law making 55 miles per hour (mph) the national maximum speed limit.