In November last year, in fog, on the A1 north of Doncaster, 100 vehicles were involved in a series of disastrous accidents. The final toll: two people killed; 34 injured - 13 of them seriously; and many vehicles written off. Newspaper headlines screamed, once more, 'motorway madness'. Now, one year later, Man Alive has been back to the disaster area, talked to some of those who survived, asked the car drivers, lorry drivers and police how it happened - and why? In a motorway cafeteria beside the M6, scene of another terrible multiple collision earlier this autumn, Man Alive brings together drivers, police, psychologists and traffic experts to discuss how we can ever avoid motorway madness.