If you think you have had too much alcohol to drink, you probably have and shouldn’t drive.
The only way to really know your blood alcohol level is to use a breathalyser. A growing number of Victorian hotels, restaurants, and nightclubs now have alcohol breath testers. They may be difficult to find in some places, so it can be helpful to ask a staff member if they have one and where it is. When you are starting to think about driving, use the breath tester and find out your actual blood alcohol level.
If you are over .05, don’t drive – catch a cab or take public transport.
Don’t forget if you are close to .05, you might not be safe to drive as your blood alcohol level might still be going up from alcohol you drank earlier. It’s worth waiting for a bit (and not having any more alcohol) and re-testing yourself with a breathalyser to make sure your alcohol level isn’t increasing.
If you are interested in being able to test your BAC on a regular basis, several companies for example www.drinkingmate.com.au in Australia that sell hand held testing devices that are very accurate.