Problem with that would be liability. If someone blows and it says they are good to drive then they hit someone and police arrive and they blow over...
Check out the drinking driving laws in British Columbia, Canada. I can't remember the limits but they can roadside suspend your lisence for 3 months...
Right. I, personally, wish it was easier to know what the limit is and how close I am too it. Many times in my 20s, I sat in a bar and waited until I...