Ms Moyagh Murdock:

We examined 1,000 files from that five-year period and approximately 330 of them involved alcohol in some shape or form and 30% of that 330, almost 100 of them, were killed and the toxicology report showed the level of alcohol to be below the legal limit. Our message would be that any alcohol impairs driving. A significant proportion of the people killed on our roads were people who were not above the legal limit. We would say one drink starts to impair one's driving. That is the reality of it. European standards and medical research show that zero tolerance would be at 0.02% or 20 mg level. That is what is considered to be zero tolerance because of medical and other residual factors in the blood stream. If one has a blood alcohol level of 0.05%, or 50 mg, one's driving is definitely impaired.