I was traveling on Saltsburg Road, Penn Hills going SE with Seneca Sr. Rehab Ctr. to my right and observed 3 hovering yellow-red lights over the treetops, about 400 yards away. I pulled over and got out for a better look when another middle-aged driver showed up (no name). Observed: Black shape like an elongated "V" or arrowhead shape with lights on the corners/ends. Craft then moved, very slowly, towards the NE. Two lights (front) with one light trailing (back), all three moved at the same time. Probably about 5000 ft. since I was at a lower elevation looking towards a half mile hill in height. Craft stopped for 2 seconds then moved off again, disappearing into low clouds. I, then, tried to get under it, traveling up Saltsburg Rd. towards Peterman's Corner about one mile observing lights (in/out) of cloud-cover then lost to sight. No sound.Time was Saturday evening, Aug. 29, 2014, 8:58 pm EST, clear to light cloud-cover. No pics because of distance.I'm always observing the sky, even while driving, boating, gatherings. Have always reported what I've seen and gotten feedback.