Ignition interlock devices require the driver of a vehicle to provide a breath sample before the vehicle starts. If the sample contains alcohol, the vehicle won’t start. Some people question how effective this is for stopping drunk driving. One factor that impacts the effectiveness of these laws is what type of law is in place.
Many states, including Missouri, have laws governing ignition interlock devices on vehicles for some people when they have their license reinstated following a drunk driving conviction. However, that’s not the most effective type of ignition interlock device law.
How does Missouri’s law compare to what’s considered most effective?
The law that’s most effective is the one that requires a person to have a specific number of violation-free days before they can have the device removed from their vehicle. Recidivism rates are lower in states that have that type of law, but Missouri isn’t one of those.
Instead, Missouri requires at least six months with an ignition interlock after the driver’s license is reinstated following a suspension for drunk driving. The court may also require ignition interlocks for people convicted of a first-time drunk driving offense. It must order one for at least six months on any subsequent convictions.
Why are some pushing for ignition interlocks as standard equipment?
Some people are pushing to have ignition interlocks included on new vehicles as a standard feature. One study found that requiring ignition interlocks on all vehicles as standard equipment could save lives.
That study found that it would take 12 years to have enough of a reach to meet only half of their potential. Proponents of this change claim this could reduce the number of drunk driving crashes, but that would only apply to alcohol-based impairment since the ignition interlock isn’t effective against drugs or other sources of impairment.
People facing drunk driving charges should ensure they understand their options and responsibilities. These change depending on the circumstances, including the number of prior offenses present. Working with someone who knows the current laws and options is often beneficial for defendants.