An Ignition Interlock Device requires you to pass a breath test before driving. However, Smart Start’s Ignition Interlock Device (IID) will NEVER shut off your car while you’re driving.

An Ignition Interlock Device—also often called a “blow-and-go,” a “car breathalyzer,” or an “IID”—is a piece of electrical equipment installed in a vehicle to ensure that the driver of the vehicle does not start the car while under the influence of alcohol. The Ignition Interlock Device connects specifically to the vehicle’s starter. When the driver enters the vehicle and turns the key in the ignition or presses a button to start the car, the ignition interlock intercepts that message and requests a breath test. If the driver passes the breath test, the car starts and becomes fully operational. If the driver fails the test, the car will not start.

Once the driver has successfully started the car, the Ignition Interlock Device will request what are known as “rolling re-tests” to prove the driver’s continued sobriety. These tests are mandatory—not because the ignition interlock will cause the vehicle to shut off without them, but because a skipped rolling re-test will result in a violation and may affect the duration of the driver’s restricted driving program. Smart Start encourages each driver to pull over to the side of the road to satisfy a rolling re-test. The device gives the driver plenty of time to pull over to a safe space so the driver can focus on taking a test. If the driver fails a rolling re-test, the device will register and report a violation, but the ignition interlock will not shut off the car.

Smart Start goes to great lengths to ensure the safety of our drivers and our devices. Neither the SSI-20/20™ Ignition Interlock nor the SSI-20/30™ Ignition Interlock will ever shut off the car while you’re driving.