NTSB Recommends Lowering Blood Alcohol Content Limits for DUI to .05

“Most Americans think that we’ve solved the problem of impaired driving, but in fact, it’s still a national epidemic,” NTSB Chairman Deborah A.P. Hersman said. “On average, every hour one person is killed and 20 more are injured.”

Each year in the United States, nearly 10,000 people are killed in crashes involving alcohol-impaired drivers and more than 173,000 are injured, with 27,000 suffer incapacitating injuries. Since the mid-1990s, even as total highway fatalities have fallen, the proportion of deaths from accidents involving an alcohol-impaired driver has remained constant at around 30 percent. In the last 30 years, nearly 440,000 people have died in alcohol related crashes.
Today, investigators cited research that showed that although impairment begins with the first drink, by 0.05 BAC, most drivers experience a decline in both cognitive and visual functions, which significantly increases the risk of a serious crash. Currently, over 100 countries on six continents have BAC limits set at 0.05 or lower. The NTSB has asked all 50 states to do the same.

“The research clearly shows that drivers with a BAC above 0.05 are impaired and at a significantly greater risk of being involved in a crash where someone is killed or injured,” said Hersman.

Among the other findings, investigators said that high-visibility enforcement efforts, such as sobriety checkpoints and saturation patrols paired with media campaigns, deter alcohol-impaired driving. And to increase the effectiveness of these programs, the NTSB recommended that police use passive alcohol sensors to help better detect alcohol vapor in the ambient environment.

The NTSB, which in December 2012 recommended that states require ignition interlocks for all DWI offenders, said that because only about one in four offenders ordered to have an interlock actually have one installed, states should employ measures to improve interlock compliance.

Further, the Board said that an intervention known as administrative license suspension, which allows law enforcement authorities to immediately suspend or revoke a driver’s license at the time of a DWI arrest, would be more effective if states required offenders to have an ignition interlock on their vehicles before licenses could be fully reinstated.