On the road, the Pennsylvania State Police is going gray. Or, more precisely, “Sterling Metallic Gray,” said Ryan Tarkowski, a spokesman for the state police. Over the next three years, the black-and-white state police fleet will be gradually replaced with medium gray vehicles emblazoned with the word Trooper on the car doors in light gray, reflective letters a foot tall. A Pennsylvania flag is emblazoned on one side while the American flag is on the other side. The paint color, stock for Ford, matches the color of state trooper uniforms. “We’re looking to better define the image of the department,” Tarkowski said. The SUVs and sedans are being cycled into the fleet as the older models reach the end of their life spans which, Tarkowski said, means the color scheme is rolled out at no additional cost to the state. “The first batch went to recruiters across the state and now they’re being rolled out as needed as other vehicles age out,” he said. The gray state police vehicles are slowly appearing at each of the four stations which make up the Dunmore-based Troop R, which encompasses Lackawanna, Wayne, Susquehanna and Pike Counties, Trooper Mark Keyes, a spokesman for Troop R said. Approximately four are on the road in the troop, Capt. Chris Paris said. The state police had last changed their vehicle color scheme — to the now passé black and white — in 1991.