Samenvatting
This paper compares accident and casualty statistics on main roads in nine counties near the London-Birmingham motorway for one year before and one year after the motorway was opened, and the savings in casualties after the motorway came into use are shown to be in good agreement with predictions made previously. On roads within approximately five miles of the motorway injury accidents were about 20 per cent in the year after the motorway was opened, but farther away the reductions were much smaller.