The Donegal County Coroner recently stated his opinion that reducing the limit from 80mg to 50mg will have no impact in reducing road deaths, while also confirming that in his 25+ years as a coroner, he has rarely if ever seen a case where moderate consumption of alcohol by a driver caused a fatality or serious injury. He believes that this move ignores the point that there is still a hard core of people driving around while several times over the legal limit, and who are causing accidents. He appealed for resources to be concentrated to catch these people, rather than moderate drinkers.
This does make sense for Donegal alright - it seems to me based on some of the high profile accidents reported in the last few years in Inishowen that Donegal has got a bigger problem of young people rallying driving while drunk than the other counties. Perhaps the other counties or the country as a whole is seeing accidents caused by more moderate drinking. Just speculating.
I agree that enforcement remains of paramount importance but I am also in favour of a sensible law i.e. one which does not permit driving while under the influence.