You go out for drinks with your friends. As everyone leaves, you decide you want to drive home. However, the breath test that you carry around on your keys tells you that you're over the legal limit. How fast will your blood alcohol concentration drop so that you can drive?
While many different factors influence how much alcohol it takes to make you feel drunk, the rate of decrease for your BAC is probably identical to everyone else you know. It's very standard across all sample groups, with no regard to things like race or gender or age. That rate clocks in at a decrease of 0.015% every hour.
So, imagine that you blew a 0.15% when you took the test. That's almost twice the legal limit. It will take you 10 hours to get back to 0.00%. It will take you around half of that just to get back under the legal limit of 0.08%.
One other thing to keep in mind is that just sobering up until you are under 0.08% does not mean you're now a safe driver. You can still be impaired by alcohol and cause an accident when you're under the legal limit.
As you can see, it's probably better if you just call a cab. You're not going to wait for 10 hours in the bar.
Of course, knowing what you should do is only half of the battle. Other drivers are still going to drive drunk. If one of them hits you and causes serious injuries, you must know what legal options you have to seek compensation.