(A) Change in the percentage of motor vehicle crashes that are single vehicle nighttime (SVN) crashes among 15 to 30-year-old drivers in intervention and control cities. (B) Change in the percentage of motor vehicle crashes that are single vehicle nighttime (SVN) crashes among 15 to 30-year-old drivers by intervention dosage level. Of the 12 intervention cities, 5 implemented < 2 DUI enforcement operations per quarter and 7 implemented 2 or more DUI operations per quarter.
Notes: The SVN/total crashes percentage is adjusted for city characteristics.
DUI, driving under the influence.