Every year, thousands of people are involved in accidents caused by individuals driving under the influence of alcohol or drugs. The legal system recognizes drinking and driving or any other form of impaired driving as driving under the influence, or DUI. DUI accidents happen every year at an astonishing rate. What many consider a victimless crime becomes a personal injury lawsuit once DUI accidents occur.One of the most important aspects of DUI accident cases is establishing whether or not the driver was under the influence of a drug or alcohol. Each state regulates the blood alcohol content requirement for alcohol, which requires no further proof of intoxication if it exceeds a specified level, such as .05%. Some common aspects of DUI accident cases included the following: