People continue to drive impaired, but good enforcement can deter them.
May 24, 2016
Alcohol interlocks cut crash deaths
Laws requiring alcohol interlocks for all drivers convicted of DUI have cut alcohol-involved crash deaths by 15 percent, a University of Pennsylvania study has found.
May 12, 2015
Sobriety checkpoints aren't used enough
Well-publicized checkpoints are a proven tool to reduce impaired driving, but few law enforcement agencies conduct them regularly, an IIHS survey shows.
More drivers use marijuana
More drivers are testing positive for marijuana and other drugs, but a new study fails to find a link between marijuana use and crashes.
March 13, 2014
Alcohol survey isn't government spying
IIHS President Adrian Lund responds to the controversy over the National Roadside Survey of Alcohol and Drugged Driving.
December 30, 2013
Alcohol-related crash deaths lag drop in weekend drinking and driving
The percentage of drivers on the road impaired by alcohol has plunged, yet the percentage of alcohol-impaired drivers involved in fatal crashes has stayed relatively constant. IIHS researchers explore possible reasons for the puzzle.
March 14, 2013
Alcohol monitoring cuts repeat DUIs
A South Dakota program that uses twice-daily breath tests to keep people sober after alcohol-related arrests has reduced the number of people who reoffend.
March 6, 2012
Interlocks for first-time offenders cut repeat DUIs
People convicted for the first time of alcohol-impaired driving are less likely to reoffend if they have to install alcohol interlocks on their vehicles, a new study of Washington state's interlock law shows. The finding provides support for requiring the devices for all offenders, not just those with multiple arrests or high blood alcohol concentrations.
November 17, 2011
Race is on to build new interlock
Developers of advanced in-vehicle detection technology have two years to build a system that reliably determines a driver’s blood alcohol concentration in a third of a second.
December 2, 2010
Drivers admit to risky habits in survey
Drivers sat texting while driving, speeding and running red lights are dangerous but admit to doing them anyway.
June 19, 2010
DWI offenders choose interlocks
When the alternative is house arrest, more offenders choose interlocks, a study in New Mexico finds.
Drinking falls when alcohol costs more
Alcohol-impaired driving and other drinking-related problems decline when alcohol costs more, studies of tax policies show.
February 6, 2010
Survey finds fewer impaired drivers
The latest national roadside survey finds alcohol-impaired driving has continued to decline, with 2.2 percent of drivers having blood alcohol concentrations of 0.08 percent or more.
September 17, 2009
Public supports technology to prevent impaired driving
People are ready to prevent any driver from starting a vehicle after drinking too much alcohol, even though the technology to do it isn't available yet. In an IIHS survey, people said they like the idea of using advanced technology to stop drunk drivers from operating their vehicles. About 2 of 3 respondents deem this a good or very good idea, assuming the technology is reliable.
July 11, 2009
States expand use of alcohol interlocks
More states are requiring interlocks for first-time alcohol offenders. Studies have shown interlocks reduce the chances of re-arrest.
December 27, 2008
Higher drinking age saves lives
An Institute review of the research confirms that the establishment of 21 as the drinking age has reduced teen drinking, impaired driving and crash fatalities.
A misguided campaign
Some groups are advocating for a lower drinking age, saying 21 has pushed college drinking underground. Evidence shows vigorous enforcement of 21 policies is a better approach.
July 24, 2008
Campaign cuts impaired driving
A crackdown on impaired driving and underage drinking in a West Virginia college town shows what stepped-up enforcement and a media blitz can accomplish.
October 13, 2007
Eliminating DWI would save 9,000 lives
A new study quantifies the lives that could be saved if there was no impaired driving and looks at how that could be achieved.
November 21, 2006
Road death toll rises
More people died in motor vehicle crashes on U.S. roads in 2005 than in any year since 1990. Much of the increase can be pinned on motorcycles.
September 7, 2006
DWI isn't just about hard-core offenders
Hard-core drinking drivers have drawn a lot of attention in recent years, but they aren't the main part of the impaired driving problem.
Washington enforces zero tolerance
An Institute study found 51 percent more arrests of 16-20-year-old drivers for alcohol violations in Washington state after the zero tolerance law took effect in 1994, compared with before.
August 6, 2005
In other highway safety news …
Washington's belt law withstands a legal challenge; research supports DWI policies; most drivers think they're above average; a final tire pressure monitoring rule is issued.
April 2, 2005
Progress stalls against impaired driving
In the U.S. and elsewhere, alcohol-impaired driving seems to be leveling off after years of declines.
August 1, 2004
In other highway safety news…
State legislators have been busy working on laws about safety belts, motorcycle helmets and alcohol-impaired driving.
July 3, 2004
Minnesota's tough penalties for high-BAC offenders work; Oregon's Supreme Court upholds speed cameras; more cities install red light cameras; rulemaking on headlight glare begins.
February 7, 2004
Many violations never make it to records
Drivers found guilty of DWI and other traffic violations had the violations withheld from their public records up to half the time, an Institute study shows.
September 25, 2003
Highway safety legislation in the states
Two states get stronger belt laws, but Pennsylvania lawmakers weaken their state's motorcycle helmet use law.
February 8, 2003
No recent progress on impaired driving
The percentage of fatally injured drivers who were impaired by alcohol has held steady in recent years. That's one of the trends visible in the latest crash death statistics.
Review supports DWI checkpoints
A review of 23 studies by the Centers for Disease Control concludes that regular sobriety checkpoints can significantly reduce crashes involving alcohol.
January 11, 2003
Drinking histories of high-BAC drivers
Fatally injured drivers with BACs of 0.15 percent or higher are more likely than other drivers to have a history of problem drinking. However, not all of them fit that profile.
March 16, 2002
Few states improve highway safety laws
Little progress was made in the states in 2001 when it comes to passing new highway safety laws and strengthening the ones on the books.
June 30, 2001
Sobriety checkpoints aren’t used enough
A lack of public pressure and concern over limited resources keeps many states from using sobriety checkpoints, even though they are an effective deterrent.
Better DWI detection is needed
A committee recommends legal and technical changes to improve detection of alcohol impairment.
0.08 percent BAC limit shown to work
A new review of the research on the effects of lowering the legal threshold for impairment to 0.08 percent blood alcohol concentration concludes that the change saves lives.
Teens don’t know about zero tolerance
Many young drivers don't know about the zero-tolerance impaired-driving laws that apply to them. A lack of enforcement may be to blame.
December 20, 2000
Best and worst state traffic safety laws
For the first time, IIHS has conducted a comprehensive assessment of key traffic safety laws in every state and the District of Columbia. Researchers rated laws on alcohol-impaired driving, young driver licensing, safety belts, child restraints, motorcycle helmets and laws allowing red light cameras.
June 19, 1999
Sobriety checkpoints in Tennessee reduce fatal crashes involving drivers with high BACs
October 11, 1997
Benzodiazepines may increase crash risk among elderly drivers
March 21, 1997
Survey finds fewer drinking drivers on the road
Fewer drivers on U.S. roads on weekend nights have been drinking, but the proportion of drivers with high blood alcohol concentrations hasn't changed significantly since 1986. These are the major findings of a new nationwide, roadside breath-test survey sponsored by IIHS and the National Highway Traffic Safety Administration.
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