In 2016, 111 million people reported driving under the influence of drugs or alcohol. However, only 1 million people were taken into custody for impaired driving in Minnesota and throughout the country. When a person drinks alcohol, it can have a variety of effects on his or her ability to drive safely. For instance, after only one or two drinks, there is a slight loss of judgment. There may also be a decline in the ability to multitask or process information visually.