State laws requiring ignition interlocks for all drunk driving offenders appear to reduce the number of fatal drunk driving crashes, a new study by Johns Hopkins Bloomberg School of Public Health and Colorado School of Public Health researchers suggests.
The study — published Jan. 5 in the American Journal of Preventive Medicine — found that mandatory interlock laws were associated with a seven percent decrease in the rate of fatal crashes with at least one driver with a blood alcohol content over the legal limit.
