The roadway across the Golden Gate Bridge rises and falls as much as 16 feet depending on the temperature. When the sun hits the bridge, the metal expands and the bridge cables stretch. As the fog rolls in, the cables contract and the bridge goes up.
There’s also a 2-hour delay because of the thermal mass of the bridge.
I’d like to see a time-lapse movie made of this.
(Or maybe I could just go back and re-watch the video of the Volga bridge and pretend that it’s the Golden Gate time-lapse I want to see.)