HARRISBURG – PA State Police announced the arrests of 492 individuals for driving under the influence of alcohol or controlled substances during a two-day detail known as Operation Nighthawk. The enforcement initiative marked its 20th anniversary with a statewide campaign on Aug. 12 and 13. State Police Commissioner Col. Robert Evanchick says “Over the past 20 years, Operation Nighthawk has been extremely successful at getting impaired drivers off the roads. We are grateful to our municipal and regional police partners who share our zero-tolerance approach to this serious crime.” The two nights led to 2,219 citations, 4,051 warnings, and 279 other criminal arrests. More than 400 troopers and over 200 municipal police officers were involved in the two-day operation. Results from Operation Nighthawk can be seen by CLICKING HERE.