The Virginia State Police has grounded an aerial speed limit enforcement program due to the program’s costs. The Associated Press reports that the agency has retired the three planes used for the program to field training. The missions range from four-and-a-half to six hours. They require a trooper-pilot, a specially trained trooper to calculate a vehicle’s speed and a trooper on the ground. Since 2008, only 20 tickets have resulted from troopers patrolling interstates in Cessna 182 airplanes. No speeding tickets have been issued this year. Between 2000 and 2008, 5,117 tickets were issued.