Section 3.1 of the report specifically covers motorway accidents and the main primary causes given were:
Failed to look properly - 25.2% Failed to judge other person's path or speed - 24.7% Loss of control - 21.5% Following too close - 16.4% Sudden braking - 12.2% Travelling too fast for conditions - 11.4% Poor turn or manoeuvre - 10.8% Driver/ rider careless, reckless or in a hurry - 9.6% Slippery road (due to weather) - 8.9% Swerved - 8.4%