Modesto police plan extra patrols against drunk and drugged driving over the weekend.
The DUI Enforcement Team will be out from 7 p.m. Friday to 3 a.m. Saturday and the same hours Saturday into Sunday. Officers will work areas with a high frequency of arrests and collisions.
The department cites research finding a drop in DUI accidents of up to 20 percent when efforts like this are publicized.
Ten people have died in 208 accidents involving impaired drivers in Modesto over the past three years, police said.
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The department cautions drivers that they can be impaired by prescription as well as illegal drugs.