All 50 states have laws requiring ignition interlock devices (IIDs) for at least some DUI offenders, but the requirements vary significantly:
States That Require Ignition Interlock Devices for All DUI Offenders
(All-Offender Laws)
These states mandate IIDs for every DUI conviction, including first-time offenders:
- Alabama
- Alaska
- Arizona
- Illinois
- Kentucky
- Louisiana
- Maryland
- New Mexico
- New York
- Rhode Island
- South Carolina
Additionally, Kentucky and New Jersey recently enacted laws requiring IIDs for all DUI offenders
States That Require IIDs Only for Repeat or High BAC Offenders
Several states require ignition interlocks only for repeat DUI offenders or those with a high blood alcohol concentration (BAC), typically 0.15 or higher. Examples include:
- Georgia
- Ohio
- Massachusetts
- Maine
- Missouri
- Pennsylvania (for BAC 0.10 or higher and repeat offenses)
- North Carolina (for BAC 0.15 or higher and repeat offenses)
- Tennessee (repeat offenses)
- Florida, Kentucky, Michigan, Minnesota, New Jersey, North Carolina, Pennsylvania, South Carolina, Wyoming (high BAC first offenses)
States with Partial or Court-Discretion Requirements
Some states require ignition interlocks based on court orders or specific circumstances such as injury or refusal to submit to testing. For example, California requires IIDs for repeat offenses and injury-related DUIs, but not always for first-time offenders
Summary
- All 50 states have ignition interlock laws.
- About 11 states require IIDs for all DUI offenders.
- Many states require IIDs only for repeat or high BAC offenders.
- Some states allow courts discretion in requiring IIDs.
This reflects a nationwide trend toward expanding ignition interlock requirements to reduce alcohol-impaired driving and related crashes
. If you need specific details for a particular state, I can provide that as well.
