No, this is a rarity. Both the state (Washington) and the federal government are responsible for funding inspection and upkeep of the Interstate road system. Additionally, non-government organizations, primarily engineering profesionals, bolster the inspection process.
This is what the much ballyhood stimulus bill of 2009 was designed to repair. Unfortunately most of the funding was diverted by political favoritism to the likes of Green Energy, et al.
Ah, ok. I thought it happened more than it should.
There’s no reason for that bridge to have collapsed. I believe an overheight semi may have rammed the girders.