It may seem cut and dry as to what a DUI is, but the law is a bit more complicated than you may think.
According to American Addiction Centers, you may not realize you are in a situation to have a DUI charge if you do not understand the different aspects of the law.
In most situations, the main proof you are driving under the influence is a test of your blood alcohol level. Law enforcement can conduct this test through a breath analysis, blood test or urine screen. The legal limit for a DUI is 0.08 or higher.
What you want to note about the BAC is that it is only for alcohol. DUIs can also be for any other substance that alters your abilities to safely drive, so a BAC test will not work in every situation.
Another point you want to note is that a DUI does not have to happen when driving an automobile. You can get this charge when driving almost anything, and you do not have to be driving on the road. Other vehicles that you could get a charge for driving under the influence include boats, lawnmowers and bicycles.
An officer only needs to have an idea that you may be under the influence to stop you. The officer in this situation has a lot of leeway for how things go. If the officer feels you are under the influence of a substance, then he or she can arrest you on a DUI. Officers do not have to have solid proof to arrest you.