graeme_p - 4:55 am on Aug 12, 2013 (gmt 0)
@lucy, what you are missing is that 40% of driver had been drinking, is not the same as 40% of accidents are caused by alcohol consumption.
People usually drink in the evening, when they are also likely to be tired and sleepy - each at least as big a risk factor as drinking. So which causes the accidents?
In my view, driving while sleepy or tired should be punished the same way as driving while drunk, but I think politicians have a puritanical streak and are want to punish drinking, rather than causing risk to others - despite horrific examples of the accidents that drinking while tired can cause (at least in the UK).