1991: A Motoring Year in 5 Images Ariel Motors Ltd was founded, making the sensational Atom. The car was the result of a university design project by an undergraduate student. New 20 mph zones were introduced in residential areas in the UK. The Dartford (Queen Elizabeth) Bridge was opened after 3 years of construction at a cost of £86 million. It was designed to relieve pressure on the two Dartford tunnels. There was a serious crash on the M4 motorway near Hungerford involving 51 vehicles. Ten died in the pile-up caused by a driver falling asleep the wheel.