Drivers who are arrested for driving under the influence of alcohol will face severe DUI penalties. In certain states drivers may be required to install an ignition interlock device on their car if they have multiple DUI arrests, refuse to take a breathalyzer test or their blood alcohol level was high when they were arrested. Ignition interlock devices can be installed on the dashboard of the car and prohibit the driver from driving if their BAC or blood alcohol level is above a certain level (generally 0.2% to 0.4%).