A few agencies participating in the crackdown are planning on getting an early start by launching their patrols late this week.
Pima County sheriff's deputies are planning patrols throughout the holiday weekend, including a DUI checkpoint on Saturday.
Spokesman Deputy Tom Peine says for the first nine months of the year, Pima County has investigated 33 deaths resulting from motor vehicle collisions that involved impaired drivers. He says that's up from 18 fatalities in both 2010 and 2011.
The statewide crackdown is scheduled to end on Jan. 1.