While it's known that driving under the influence is illegal in Texas, there's often confusion as to what constitutes being drunk, how one can be charged with DWI offenses and the potential consequences for a conviction. There are certain laws in place to try and preclude drivers from driving after drinking and to impart punishments if they do commit the act, are caught and convicted.
Even with the laws, there will still be people who choose to drink and drive. People who have had a drink or two might not realize the affect that can have on their reactions when they're operating a motor vehicle. It depends on the size of the person drinking and other factors. The level of blood alcohol content to warrant an arrest is 0.08 percent. This can be measured with a breathalyzer machine or via blood test.