UFO flew directly over our car at night without making any sound at all. There were 4 witnesses.

Saw 2 lights flying together and noticed erratic flying patterns. Got in car and chased objects for 20 minutes before losing them. A minute or two later one of the objects approached from the west and flew directly over our car which was pulled over to the side of the road. There was no noise at all. This was about 9:00 PM. The object then came to a complete stop about 200-300 yards east of us and started to descend. It hovered for a few minutes maybe only 500-1000 feet altitude. It then ascended and flew off. We could not chase it anymore since there were no roads east of us.
Had many more sighting between 1973-1976 in the Milwaukee area. The objects always had a bright white light in front of the craft and a red and green light behind it. Lights would never pulsate and there were no stobe lights. They never made any sound.
Date is approximate.  PD