HC Deb 03 March 1970 vol 797 cc81-2W
102. Mr. Cronin

asked the Minister of Transport what research has been carried out by his Department into the potential increases in the danger caused to other road users by drivers having 100, 200 or 300 milligrammes of alcohol in 100 millilitres of their blood, respectively.

Mr. Mulley

The Road Research Laboratory Report (No. 6) based on an earlier study in the United States, estimated that drivers with a blood/alcohol level between 100 and 119 mg./100 ml. were on average more than 5½ times as likely to be involved in an accident as drivers who had not been drinking. Corresponding comparisons are not available for levels of 200 mg./100 ml. and 300 mg./100 ml. but drivers with a level above 160 mg./100 ml. were estimated to be on average 21 times as likely to be involved in an accident as the non-drinking driver.