Every year in Britain 370,000 people are injured or killed in car crashes - more than the population of a city like Bristol. If these casualties were to happen in one place at one time they would shock the nation into urgent action to prevent such a catastrophe ever happening again. But because they are spread over 365 days and thousands of miles of roads, few people appear to take any notice - or to care. Last week Man Alive looked at the causes of road accidents. This week we investigate one of the weapons available to fight death on the roads - the law. How effective is the law in preventing road accidents and does it adequately protect the victims? Are motoring offenders criminals and should they be treated as such?