(Portland, OR) -- Police say 85 people were arrested in the Portland area during a four-day enhanced St. Patrick's Day traffic enforcement mission. Two-dozen law enforcement agencies worked together to watch for drivers who were impaired, speeding or making other violations. Officers made more than 12-hundred traffic stops issuing 730 tickets and 925 warnings. Eighty-five people were arrested. About 60 of the arrests were for suspicion of driving under the influence. Most of the tickets were for speeding.