I was on my way home from work heading down Commonwealth at 3:00am when I got to the intersection with the quality inn next to it I noticed a faint red light moving very fast across the sky from south to north. I thought it was a plane at first maybe a jet since it was extremely fast, when I got halfway to lane avenue it was north of the intersection and slowed down to a stop. I stopped at the light to turn right down lane and it started moving back towards the south but got closer to the street. I drove for about a minute looking out my side window at it, it actually kept up with my speed then started slowing down. I wasnt able to see if it vanished or took off as i was driving but I could make out at least 3 red lights, a bright red one in the center and 2 faint red ones on the edges. It was about the aize of 3-4 cars. It either looked like an L shape or a triangle that was at an angle. I've seen satellites and planes all the time but I've never seen anything change speed and direction like that. I thought it was cool at first but then I got chills.