Fairly positive I was en-route from Toronto to Petersborough, Ontario, Canada, possibly heading northerly on route 115.
No sunlight visible.
Window of car rolled down, no reflections possible.
I was not wearing sunglasses.
As I was gazing at this scenery a dark object came down out of the dark cloud, levelled off and shot up through the cloud.
It's shape was of the inverted saucer on top of another saucer type.
No rudder or wings visible and silent.
I shouted to my friend who was from Petersborough, Canada to look.
I don't think he saw it as he wore rather thick glasses and had never driven a car.
I would judge the distance from us to the object with the hill in the background to be not more than one mile.
I had been in and out of the Marines twice.
Had observed dive bombings along the western shore of the Red Sea and strafing and bombing in Korea, all these planes clearly had wings and rudders as well as very audible engines.