Dead tired or dead drunk? Fatigue kills - What should be done?

The Government's Think! campaign has produced posters, radio advertisements and leaflets to publicise the dangers of driving while tired.

Jools Townsend, head of education at road safety group Brake, says: 'We need to see high-profile advertising campaigns about the dangers of driving while tired to educate drivers.'

Professor Parkes adds: 'It's easy to understand that a long motorway drive may be tiring, but few are aware of the morning-after effects highlighted by these tests.'