Dr Declan Bedford presented his research on drink driving in Ireland to a special one-day conference in Dublin organised by the Road Safety Authority. He said more than a third of drivers killed in crashes are not tested for alcohol and drugs. He told the conference in Dublin that there was no level of alcohol in the blood at which driving was safe. A consultant in public health medicine, Dr Bedford carried out an analysis for the HSE of 995 crashes between 2003 and 2005 in which more than 1,000 people were killed.