Federal accident investigators recommended Tuesday that states cut their threshold for drunken driving by nearly half, matching a standard that has substantially reduced highway deaths in other countries.
The National Transportation Safety Board said states should shrink the standard from the current .08 blood alcohol content to .05 as part of a series of recommendations aimed at reducing alcohol-related highway deaths.
More than 100 countries have adopted the .05 alcohol content standard or lower, according to a report by the board's staff.
In Europe, the share of traffic deaths attributable to drunken driving was reduced by more than half within 10 years after the standard was dropped.
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