80 mg / 100ml blood = 35mg / 100ml breath.
50mg / 100ml blood = 29/30mg /100ml breath (if my mental arithmetic is correct).
I wonder what their advertising strategy will be; people still think in terms of two pints of lager or two small glasses of wine etc.
The strategy seems to be that it is unsafe to drink any amount of alcohol before driving .
I never heard of the two pint rule , but have generally considered ( for myself , being of average height and build ) reasonably safe to have one pint over lunch , then to drive home three or four hours later ; if driving sooner I generally stick to a half pint , and would not drive if I felt in the slightest impaired .
What I would be interested in would be the statistics for people between the new and old limits : that is , how much less likely are you to be in a crash at the new , lower limit than at the old one .
There also seems to much ignorance around the elapsed time between having that drink and your blood/alcohol level returning to a safe and legal one . Many seem to now feel that even one small drink puts you out of the driving seat for min 24 hours ; I rather suspect that , for most people having had one drink only , a much shorter period would see you legal again .
As has been hinted , most serious RTC's are caused by people well over the limit and , while someone just on the legal limit might be impaired such that reaction times are slower , it is debatable just how much of a danger they might be to themselves or , more importantly , to others . I do accept , however , that a line has to be drawn somewhere .
As has been said earlier , this will impact most on people , like myself , who live out in rural areas and don't have the luxury of public transport to their doorstep .
For many , like myself , coming home late from a night out leaves no alternative to either driving up from the railway station , or walking up dark , unlit country roads , possibly in the rain , for several miles .
While I would never go out and get blitzed before driving home , I now feel as though I am verging on being criminalised if I go for a meal with my family , having one glass of wine or a beer with my meal , and then getting the train back to my local station before driving the couple of miles to my house .