Ignition Interlock Device (IID) Resources

A breath alcohol ignition interlock device (BAIID or IID) is attached to the ignition of a vehicle and is designed to prevent a vehicle from being operated by a person who has consumed alcohol. When properly installed and calibrated, the IID will prevent a driver from starting a vehicle if the device detects a breath alcohol concentration (BrAC) above the prescribed setpoint.

For more information and FAQ's regarding Ignition Interlock and DOL IID Requirements, please visit www.dol.wa.gov/driverslicense/ignitioninterlock.html.