HC Deb 24 March 1998 vol 309 c83W
Mr. Levitt

To ask the Secretary of State for the Environment, Transport and the Regions in how many fatal road accidents in the last three years over-tiredness has been assessed to be a contributory factor. [34336]

Dr. Strang

Information is not at present collected on the causation of injury road accidents on a national basis. However, research commissioned by the Department estimated that tiredness is a principal contributory factor in around 10 per cent. of road accidents. Details of this research were published in TRL Report 169 (1995),Driver sleepiness as a factor in car and HGV accidents.