Are you confused about the difference between DWI and DUI? DWI stands for Driving While Intoxicated, while DUI stands for Driving Under the Influence. Well, that clarifies things, doesn’t it? In Texas, the difference is actually a matter of age. If you are over 21 and you get pulled over after drinking and driving, you can and probably will be charged with Texas DWI if you are mentally impaired or have a blood alcohol level above .08. However, Texas also has a “zero-tolerance” law on the books for people below the legal drinking age. Since it’s illegal for you to drink, period, it’s illegal for you to drive after drinking any amount of alcohol. Texas DUI is what people under 21 get charged with if they have any detectable amount of alcohol in their system, even if they are not impaired by it. Of course, if you’re under 21, you can still be charged with Texas DWI if you’re driving intoxicated. The choice is left up to officer who arrests or cites you.