Interlocks have shown to be one of the most effective ways of keeping repeat drunk drivers off the road. Those who are involved in fatal crashes and had a BAC of .08 or higher are eight times more likely to have had a prior conviction for DWI/DUI than those drivers who didn't have alcohol in their system.
Studies have found that the installation of ignition interlocks leads to a 70-percent reduction in impaired-driver arrests.
Currently, interlocks are only installed by court order. And with an interlock system such as those provided by Smart Start, six violations are allowed; after that the vehicle won't start at all. But for a warning, the system would typically be calibrated at .03-.04 BAC, a level well below the .08 threshold for DUI.
Would alcohol detectors keep more Americans home?
What do you think? Is buzzed driving—or light alcohol consumption before driving—okay?