<P> `` Drunk driving '' is the act of operating or driving a motor vehicle while under the influence of alcohol or drugs to the degree that mental and motor skills are `` impaired '' . It is illegal in all jurisdictions within the United States , though enforcement varies widely between and within states / territories , to drive a motor vehicle while impaired or with a breath or blood alcohol concentration of 0.08 % or greater if over the age of 21 . </P>
<P> `` Drunk driving '' is the act of operating or driving a motor vehicle while under the influence of alcohol or drugs to the degree that mental and motor skills are `` impaired '' . It is illegal in all jurisdictions within the United States , though enforcement varies widely between and within states / territories , to drive a motor vehicle while impaired or with a breath or blood alcohol concentration of 0.08 % or greater if over the age of 21 . </P>
what is the blood alcohol limit in usa
what is the blood alcohol limit in usa
0.08 % or greater
0.08 % or greater