We never shared a class @Murchr so wacha kejeli. I doubt you would have beaten me in academics unless if you were an A+ student. I was a marking scheme in physics all the way to campo. I talked about allowance for expansion/contraction in my post think that is form 1 or 2 physics. There are those joints to allow for 'horizontal movement'(expansion/contraction). I was asking why a reinforced rigid pillar fixed and reinforced into the earth feels like its swinging sideways. Its like KICC acting like a pendulum. Unless if there are rollers between the pillars and those horizontal structures that form the tarmac.
Plus I don't expect the shaking to result from the cars moving under the bridge. Maybe a trailer/train would. A vitz/note cannot. The shaking would most probably be caused by the heavy cars moving on the bridge or wind..
"The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence." ― Charles Bukowski