The History of DUI Laws in the United States – 1930 to 1960

The end of prohibition in 1933 brought alcohol back to American living rooms and restaurants. In addition, the gradual end of the Great Depression meant more average Americans were able to buy automobiles, often for the first time. This combination increased the number of alcohol-related accidents and re-focused America's attention on the problem of drinking and driving.

One of the most notable such accidents of that era involved best-selling author Margaret Mitchell, whose Civil War era novel, "Gone with the Wind" had earned her more than $1 million in royalties. Ms. Mitchell was crossing the street near her Atlanta home in 1949 when she was struck by an off-duty taxi driver motoring down the wrong side of the street. She died of her injuries several days later. The driver later admitted to having had several drinks.

Measuring Blood Alcohol Levels

The first DUI laws in the United States prohibited driving drunk, but left it up to the arresting officers to determine what "drunk" meant. It wasn't until 1938—more than 30 years after the first DUI laws were enacted--that legal blood alcohol levels were set. The first breathalyzer, called the "drunk o meter," was created by Indiana University professor Rolla N. Harger in 1931. This early, balloon-like device would change color if a person's breath contained alcohol. (The present-day breathalyzer test was invented in 1954 by an Indiana State Police Captain.)

This era also saw the American Medical Association get involved in drinking, driving and public safety. They created a Committee to Study Problems of Motor Vehicle Accidents in 1938. This committee was partially responsible for setting the legal blood alcohol level at .15 and below. Indiana took this information and enacted the first Blood Alcohol Content (BAC) law in 1939.

As the "Mad Men" era of the 1950s and 1960s ended and with it much of the "glamor" of excessive drinking, organizations like MADD and SADD began to have political clout. In addition, DUI laws began to become more stringent as public opinion shifted to favor such laws. In our next post, we'll look at how DUI laws changed from 1960 to 1990.

This is the second post of a four-part series on the history of DUI laws in the United States and their enforcement. Last time, we talked about how DUI laws began in this country. We hope you'll visit again over the next few weeks as we discuss how DUI laws in the United States have evolved over the past decades.