Driving northbound on the Lodge around 8PM on Friday, smoke began appearing after passing under the Hamilton Bridge.

At first I thought it would be some junker that had blown its rings and flipped on the air re-circulation. But by the time I reached the Davidson curve it was clearly more than that and was slowing traffic.

So I flipped on my iPhone video camera in its dashcam mount and shot this video.



The answer to its origin came at the Livernois exit where it smoke was pouring down into the ditch from an undetermined source and filling the expressway or miles.

But the puzzle remains. Why didn't the smoke go up? What is the physics answer to why the smoke would move DOWN and remain down for miles? Any clues?