How an Alcohol Interlock Device Can Help Prevent Drunk Driving

Drunk driving is a serious problem that can lead to severe consequences for both the driver and other people on the road. According to the National Highway Traffic Safety Administration (NHTSA), about 10,142 people were killed in alcohol-impaired driving crashes in 2019. This represents 28% of all traffic fatalities in the United States. However, there is a solution to this problem: an alcohol interlock device.

What is an Alcohol Interlock Device?

An alcohol interlock device, or IID, is a breathalyzer installed in a vehicle that prevents it from starting if the driver’s blood alcohol concentration (BAC) exceeds a certain limit. The driver must blow into the device before starting the car, and if their BAC is above the limit, the engine will not start.

How Does an Alcohol Interlock Device Work?

When you blow into an IID, it measures your BAC level. If your BAC level exceeds the predetermined limit set by your state law or court order, then the car will not start. If your BAC level is below that limit, you can start your car as usual.

In addition to preventing drunk driving, IIDs also require drivers to take random breath tests while they are driving. If they fail these tests or do not take them when prompted, alarms will sound and lights will flash until they pull over and turn off their vehicle.

Benefits of Using an Alcohol Interlock Device

One of the most significant benefits of using an alcohol interlock device is that it prevents drunk driving by keeping impaired drivers off the road. It also provides accountability for those who have been convicted of DUIs or DWIs by requiring them to pass breath tests before operating their vehicles.

Studies have shown that IIDs are effective at reducing recidivism rates for drunk driving offenses. According to a study published by the Center for Disease Control and Prevention (CDC), IIDs can reduce repeat DUI offenses by up to 67%.

Furthermore, some states have implemented programs that offer incentives for drivers to install IIDs voluntarily. For example, in Oregon, drivers who install an IID can have their license reinstated earlier than those who do not.


An alcohol interlock device is a powerful tool in the fight against drunk driving. It helps prevent impaired drivers from getting behind the wheel and keeps our roads safer for everyone. If you have been convicted of a DUI or DWI, consider installing an IID in your vehicle as a responsible way to regain your driving privileges.

This text was generated using a large language model, and select text has been reviewed and moderated for purposes such as readability.