Again---depends how you define "impaired." The new .08 thing is hore*****e. Thats like 2 beers after work. I detest "drunk" drivers, but most people I know, including myself, have probably driven @ or around .08.
I saw a statistic in WI a few weeks ago that after 2:00 65% of all drivers are drunk or something to that effect.
Now, how many bike ride their bikes when impaired????---To me this is a much safer option in the summer than driving to the bars.