This really, really bothers me. This bridge is VERY similar in construction to Novy Most ("New Bridge") in Bratislava. The mast carries the main vertical loads. Both ends are essentially "floating". I thought the abutments looked undersized until I saw anon's photo.
IMHO, something other than a heavy object dropping on it happened to have it pancake on the roadway.
I've been ON Novy Most many times. I'm related to engineers who are colleagues of those who designed it. I'm related to a lot of engineers.
I suspect fuckery.
This makes me unhappy.
And NO, I am NOT a structural guy. I harrass electrons.