Ignition interlock devices that prevent drivers who have alcohol in their systems from operating a motor vehicle can help reduce the rate of traffic accident fatalities by as much as 15%.
Those are the results of a new study by researchers at the University of Pennsylvania. The study used crash data from 18 states that currently have laws requiring ignition interlock devices for all motorists convicted of DUI. The researchers found a 15% cut in the rate of traffic accident fatalities in states that require ignition interlock devices for anyone convicted of driving while impaired.
In states that had these universal laws, 915 lives were saved in accidents during the study period from 2007 to 2013. Other studies have also indicated that states with mandatory ignition interlock laws reduce the likelihood that a previous offender will be arrested for drunk driving.