Drunken | Impaired Driving


Man using an ignition interlock device.

Where Do States Stand on Ignition Interlock Devices? 

Alcohol-impaired driving kills on average 10,000 people every year. Requiring drivers convicted of a DUI to install ignition interlock devices (IID) in their vehicles to prevent recidivism has garnered wide consensus among traffic safety experts and practitioners. Learn more about state IID laws and the effectiveness of IIDs in this new Review. 


marijuana and car keys

Drugged Driving | Marijuana-Impaired Driving

With the passage adult use laws in four states, and medical marijuana laws in many others, there is increased interest in marijuana-impaired driving. Check out this 50-state map that shows marijuana impaired driving and state marijuana laws.



Drunk | Impaired Driving


Cocktail on the rocks with keys.

Drunken Driving

This page reviews current U.S. state drunk driving laws.


drink and car keys

State Ignition Interlock Laws

Find out state-specific laws relating to ignition interlock laws. All 50 states have some sort of ignition interlock law.


drink and car keys

States Explore Oral Fluid Testing to Combat Impaired Driving

As states and law enforcement agencies explore avenues to remedy drug and alcohol testing issues, the use of oral fluids to detect drugs is gaining popularity.