From
philly.com:
Arrests by the Pennsylvania State Police for driving under the influence were up in 2010 for the ninth year in a row, the agency announced Thursday.
The increase can be attributed to better training for police looking to take impaired drivers - those using alcohol, drugs, or both - off the roads, and increased enforcement efforts through checkpoints and roving patrols, state police said.
Since 2004, 70 troopers and 22 municipal officers throughout the state have been certified as
drug-recognition experts (DREs), and have conducted more than 4,000 evaluations of people thought to be impaired.
Thirty-nine other states also are using the program, developed by the National Highway Traffic Safety Administration, to train officers to recognize the signs and symptoms of drug-impaired drivers. They administer testing that goes beyond the breath test to check pulse rates and take blood.
The program also helps police recognize whether a driver is suffering from a medical condition rather than drug impairment, police said.