"In terms of someone having a blood alcohol level of .1, are you able to say how that person would be feeling or their impairment of judgment or coordination and so on, or does vary from person to person, as to their awareness of that? --- It does vary; that's common knowledge. There are people who are prepared to declare that they are perfectly competent to drive with high blood alcohols and that they are sure of it, despite all the evidence, and they are all wrong. Nobody can drive competently with a blood alcohol of .1, even a hardened drinker, whereas on the other hand there are a lot of people who are aware at very low blood alcohols that there is something slightly wrong with their ability to pay attention and they will spontaneously not drive at concentrations even lower than .05, so people have very different perceptions of driving impairment with alcohol.
You said that no-one, not even a hardened drinker, could drive competently at .1? --- Everyone is impaired at .1 or above.
The kinds of impairment that you talk about, are they the things that you discussed earlier on in your evidence in terms of judgment, reaction time, confidence, those kinds of things? --- Yes. The whole think can be summarised by saying that there is an increased accident risk in people with blood alcohol concentrations of .1, regardless of driving experience.
The factors, just so we are clear, that increase that risk - sorry, the increased risk is due to an impairment of what particular skills? --- It's impairment of judgment, false confidence, delayed reaction time, impaired ability to track things visually, sleepiness, inattention and in some instances the aggression that alcohol can induce."