What is an Ignition Interlock Device and How Does it Work?

Many states, including Virginia, require the use of an ignition interlock device by anyone convicted of a DWI. Not everyone knows what they are or how they work. In fact, there are various providers that are able to install the device and monitor it each month. What many people do not know is that the fees associated with the interlock device are quite steep. There is an initial installation fee, plus a monthly fee, so the cost of drinking and driving can increase quickly.

Once installed, the driver must blow into the device in order to be able to start their vehicle. If there is no alcohol detected, the vehicle will start. Every so often, the driver will be required to blow into the tube. If the machine detects alcohol during what are called the "rolling tests," the machine will not allow the driver to continue operating the vehicle. If the machine detects alcohol during the initial test in order to start the vehicle, you will have to re-test a short time later. If you fail the test again, it will be reported back to the interlock provider as a violation and that can result in a longer period for using the device.

Drivers with an interlock device should always remember that the machine is VERY SENSITIVE. That means that any consumption of anything with even trace amounts of alcohol will likely result in a failed attempt. The most common substance that results in a failed attempt is mouthwash.

If you have been arrested for DWI in Virginia, call Portner & Shure for a free consultation and let us help walk you through the process: (703) 916-1227