And the bridge was also of a bad design. It clearly lacked bridge pillar protection which new bridges do have. Even worse, the type of protection required probably could have been retrofitted easily, it's being called concrete dolphin and looks like below. This is the Sunshine Sky bridge in Florida, and old truss bridge, and the newly one build aside it has these concrete dolphins clearly visible in the water to protect its pillars.
Jeff here has quite a lot to tell about the potential deficencies of the bridge which went down.