US states expand ignition interlock requirements for DUI offenders

States in the western United States are implementing or expanding requirements for ignition interlock devices (IID) following DUI convictions.

In Nevada, state law generally requires the installation of an IID on any vehicle operated by a person convicted of a DUI. These devices, which prevent an engine from starting if alcohol is detected in the driver's breath, must remain installed for periods ranging from 185 days to 36 months. Recent legislative changes have expanded these requirements so that almost anyone convicted of a DUI, including first-time misdemeanor offenders, will face an IID mandate to retain driving privileges.

In California, Assembly Bill 1830, authored by Assemblymember Cottie Petrie-Norris, seeks to make a permanent statewide ignition interlock program. The bill would require IIDs for individuals convicted of a DUI after the first offense. Under the proposed legislation, first-time offenders would face a six-month license suspension, while those causing bodily injury would face a one-year suspension. The bill aims to replace a limited pilot program with a coherent framework, aligning California with 35 other states that have similar permanent requirements.