The Whipping Bridge

I was at the top of a high cliff and looking down on a river estuary.
A bridge was at the other side of the water coming from somewhere out to sea.
Where it made landfall was a large gap which slowly whipped closed as a car approached land. The cars then went through a short tunnel. Seemed as if the weight of the car helped some sort of whiplash effect. No cars travelled in the opposite direction. Unusual.
Standing in the water and observing the bridge were two giant men. Either they were giants or the bridge and the cars were tiny.
They saw me looking at them and one shouted up an obscenity.
Probably all best left alone.