TIRF USA, Inc.: Annual Ignition Interlock Survey: United States


The Traffic Injury Research Foundation USA, Inc. (TIRF USA) in partnership with the Association of Ignition Interlock Program Administrators (AIIPA) and TIRF in Canada conducted a national survey of the number of total installed and active installed ignition interlocks in the United States in 2015, and from January 1st through August 31st, 2016. These data provide a comprehensive picture of interlock installations across the United States and comparisons are made to data from the previous year where feasible.

The report summarizes a variety of results including impaired driving arrest and conviction data by state, the percentage of convictions per impaired driving arrests, the total number of installed interlocks and total number of active installed devices at a specific point in time in 2015 and 2016, as reported by both state agencies and manufacturers. The report also contains the total number and active number of installed devices according to offense categories, and the percentage of installed interlocks per impaired driving arrests and convictions according to states and manufacturers. The proportion of offenders deemed eligible to install a device, and the proportion of offenders that actually installed the device were also calculated. The survey from the preceding year is also available.



Association of Ignition Interlock Program Administrators

Project Status: Published

If you would like more information about this or any other project, contact:

Traffic Injury Research Foundation USA, Inc.
Corporate Office | T: 202-507-6334 |