0.081 is very high alcohol impairment too though.  Really should not be driving or doing anything requirement responsibility with BAC higher than .03.  A glass of wine with dinner will not see joe blow's BAC get as high as 0.03, even. My lowest move on this planet was the day I shared a bottle of wine with dinner, and had two or three gin martinis, then drove home. Ran into a police check on the way home .. and I blew a 0.03.  I was sure I was going down in that condition.  It left me feeling guilty and newly aware how ridiculously lax the current limits are!