Ignition Interlock
After being convicted of drunk driving, an individual may be ordered to have an ignition interlock device installed in his or her vehicle. An ignition interlock system works like a breathalyzer test and will not allow a vehicle to start unless the driver can blow into the device and register a BAC that is under a pre-determined limit.
If you or someone you love has been accused of drinking and driving, contact the San Antonio drunk driving defense attorneys at the Law Offices of Chris S. Barnett today at 210-587-6464.
Ignition Interlock Basics
Ignition interlock systems usually require a driver to blow a blood alcohol content level of 0.02 percent or lower, though the specific allowable BAC may vary based on an individual’s sentencing. For instance, some individuals may have to blow a 0 BAC in order for their vehicles to start.
When an individual blows a BAC above the allowable level, the ignition interlock system:
- Will not allow the car to start
- Will not reactivate for a set period of time
- Will record the failed blow attempt
In some instances, an ignition interlock system may require a driver to blow into the device even after his or her trip has begun. This is intended to prevent drunk drivers from having sober individuals start their vehicles for them.
Contact Us
An ignition interlock device is just one of the potential punishments that a DWI conviction can carry. If you were recently accused of DWI, contact the San Antonio drinking and driving defense attorneys at the Law Offices of Chris S. Barnett at 210-587-6464 today.


