Interlock devices are becoming increasingly common in Texas, especially for those convicted of a DWI offense. In this blog post, we’ll explore what an interlock device is, who courts require to have one, and how it works.

What is an Interlock Device?

An interlock device is a type of breathalyzer that you install in a vehicle’s ignition system. Before starting the vehicle, the driver must blow into the device, which measures their blood alcohol concentration (BAC). If the driver’s BAC is above a certain limit (usually 0.02%), the device will prevent the vehicle from starting.

Interlock devices are designed to prevent individuals from driving under the influence of alcohol. Courts commonly require them as a condition of probation or for reinstating a suspended driver’s license.

Who Must Have an Interlock Device?

In Texas, individuals who are convicted of a DWI offense are often required to have an interlock device installed in their vehicle. The specific requirements vary depending on the circumstances of the offense and the driver’s criminal history.

Here are some common scenarios in which a court might require an interlock device:

  • First-time DWI offense with a BAC of 0.15 or higher: The driver will be required to have an interlock device installed for at least six months.
  • First-time DWI offense with a BAC below 0.15: The driver may be required to have an interlock device installed for up to one year.
  • Second or subsequent DWI offense: The driver will be required to have an interlock device installed for at least one year.

It’s important to note that these are just general guidelines. The court will determine the specifics of each case.

How Does an Interlock Device Work?

When a driver installs an interlock device in a vehicle, they must blow into the device before starting the engine. If the driver’s BAC is above the legal limit, the device will prevent the engine from starting.

Once the engine is running, the device will prompt the driver to take additional breath tests at random intervals. This is to ensure that the driver did not consume alcohol after starting the vehicle.

If the driver fails a breath test while the vehicle is running, the device will trigger an alarm (such as flashing lights or a horn) and may temporarily lock the ignition system. The driver will then have to take another breath test to start the vehicle again.

Interlock devices also record all breath test results and other information, such as attempts to tamper with the device or bypass it. This information is typically downloaded and reviewed by the driver’s probation officer or other authorized parties.

Conclusion

Interlock devices are becoming more common in Texas as a way to prevent drunk driving. If you are convicted of a DWI offense in Texas, you may be required to have an interlock device installed in your vehicle. The requirements vary depending on the circumstances of the offense and your criminal history.

If you have any questions about interlock devices or other requirements related to a DWI conviction in Texas, it’s best to consult with an experienced attorney. They can help you understand your rights and obligations and guide you through the legal process.

Call Carter Criminal Defense Today for a Free Consultation.