The high rate of death related to drunk and drugged driving can be dramatically reduced by the installation of ignition interlock device (IID) for all convicted drunk drivers, including first-time offenders with a blood alcohol concentration (BAC) of .08 or greater. States with this restrictive law have witnessed a significant decline in drunk driving deaths compared to states with laws requiring only repeat offenders or first-time offenders with a BAC of .15 or greater to install IID. With the implementation of this more restrictive law, drunk driving fatalities of Arizona and Oregon decreased 43.2% and 42.7% respectively. To the contrary, states with law requiring the installation of IID among only repeat offenders or first-time offenders with a BAC of .15 or higher had slow declines. The fatality reductions concerning DUI in Florida and Nevada were 21.7% and 26.8%.
A report published by the Insurance Institute for Highway Safety also confirmed the effectiveness of IID for all convicted drunk drivers, including first-time offenders with a BAC of 0.08 or higher. It also found that focusing on convicted drunk drivers with .15 BAC or greater is a bad policy because the target population of this bad policy is too narrow to make sense. Moreover, the research from Centers for Disease Control and Prevention (CDC) indicated that first-time offenders have driven drunk for at least 80 times before being arrested. Therefore, asking all convicted drunk drivers including first-time offenders with a BAC of .08 or greater to install IID is an effective way to reduce the fatality rate related to drunk driving.
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