Shaped like the letter "A", flew directly over top of us at est 500 ft.

I was with my mother, she was driving southbound on I-75 from Saul Ste Marie, Ca.  I looked up and saw what looked like a large letter "A" moving directly over top of us from left to right at about 75 to 100 Mph.  It was approx. 500 feet above us and it had really neat lights on it, red, blue, green, bright red.  It was moving from east to west.  I only saw it for about 15 seconds and it disappeared.  "Not quickly" I merely couldn't see it any more because of the trees around our car.  My mother and I went home and told my father (A B-52 Gunner at the time) and he "dismissed it as being an airplane".  I have since spent 10 years in the Air Force as a KC-135 In flight Air Refueling Boom operator instructor from 1986-1996, I have refueled over 5,000 airplanes in flight and have never seen anything like the craft I saw that night.  I am currently a police officer in the state of Washington. I do not know anything more so contact with me isn't needed.