The history of DUI in law goes back over a century. DUI stands for “driving under the influence.” This usually means driving after drinking alcohol or using drugs. Over time, laws have changed to protect the public, reduce road deaths, and set clear limits. From early laws in the 1900s to advanced tests used today, DUI law keeps evolving. Let’s explore how it all started and where we are now.

The First Drunk Driving Law
The Start in the United Kingdom
In 1872, the UK passed one of the first laws against drunk driving. It said that anyone driving a carriage, horse, or cattle while drunk could be fined. Though it wasn’t a car-related law, it showed that drinking and travel didn’t mix well. This idea would soon spread across the world.
The First U.S. DUI Law
In 1910, New York became the first U.S. state to pass a law against drunk driving. Soon, other states followed. These early laws were simple. They banned driving “while intoxicated,” but didn’t define how much alcohol made someone drunk. Police had to rely on signs like slurred speech or the smell of alcohol.
Invention of the Breathalyzer
A Game-Changer for DUI Cases
In 1938, Dr. Rolla Harger created the “Drunkometer.” It was the first device that could test a driver’s breath for alcohol. This marked a major shift in the history of DUI in law. Now police had proof, not just opinions. Later in 1954, the Breathalyzer was invented by Robert Borkenstein. It was smaller, faster, and more accurate. Soon, courts across the U.S. began to rely on it.
Setting a Legal Limit
That same year, the American Medical Association suggested a legal limit for blood alcohol content (BAC). They said 0.15% was too high to drive safely. The National Safety Council agreed. In time, states used this advice to create specific BAC limits. This helped make DUI law clearer and more fair.
Changing Public Views
Rising Road Deaths in the 1960s and 70s
As cars became more common, so did crashes. By the 1960s, thousands were dying in alcohol-related accidents every year. Public concern grew. Still, many saw drunk driving as just a mistake—not a crime. That started to change in the 1980s.
Mothers Against Drunk Driving (MADD)
In 1980, a woman named Candy Lightner lost her daughter to a drunk driver. She started MADD—Mothers Against Drunk Driving. The group pushed hard for stricter DUI laws. They asked for lower BAC limits, license suspensions, and more police training. MADD changed the public view. Drunk driving was now seen as dangerous and deadly.
Federal Involvement
BAC Set at 0.08%
In 2000, the U.S. Congress passed a law to make the legal BAC 0.08%. States had to follow it or lose highway funds. By 2005, every state had adopted the 0.08% limit. This was a key moment in the history of DUI in law. It created one clear national standard.
Zero Tolerance for Young Drivers
At the same time, zero-tolerance laws were added for drivers under 21. These laws set the BAC at 0.02% or lower. This aimed to stop teens from drinking and driving. It also helped reduce the number of fatal crashes involving young drivers.
New Tools and Tests
Advanced Breath Tests
Today’s breathalyzers are much more advanced. They use sensors to give fast and accurate results. Many police cars carry them. Some states even require DUI offenders to use ignition interlock devices. These tools stop the car from starting if alcohol is detected.
Drugged Driving Laws
Now, DUI laws also cover drugs. This includes both illegal drugs and prescription pills. Police use blood or saliva tests to check for drugs. As drug use increases, states are adding stronger rules for driving under the influence of drugs.
The Role of Courts
DUI Courts for Repeat Offenders
Some states now use special DUI courts. These are for people with multiple offenses. They focus on treatment, not just punishment. Offenders may go through rehab, counseling, and regular check-ins. If they succeed, they may avoid jail. This is one way the law is trying to solve the problem long-term.
Strict Penalties for DUI
Today, DUI penalties are tough. A first offense can mean a fine, license suspension, or even jail. A second or third offense brings higher penalties. Many states also require alcohol education classes. The law wants to stop repeat behavior and save lives.
DUI Laws Around the World
Lower BAC Limits in Other Countries
Some countries have even stricter laws. In Sweden and Japan, the BAC limit is 0.02%. In some places, it’s zero. Penalties are also harsher. This shows that the fight against drunk driving is global.
Global Push for Safer Roads
The United Nations and World Health Organization both support strong DUI laws. They urge countries to lower BAC levels, increase testing, and raise awareness. Worldwide efforts show just how serious the problem is.
Conclusion
The history of DUI in law is a story of change. It began with simple rules and grew into a global effort to protect lives. Thanks to new technology, strong advocacy, and public support, DUI laws have become tougher and more effective. But the fight isn’t over. Every year, new cases and new dangers appear. That’s why it’s important to keep learning, keep improving the law, and keep our roads safe for everyone.