This doesn't look good at all. The Bay Bridge is closed today after a piece fell off it last night.
It's not just that the infrastructure is getting old: this particular fault was seen as routine repairs were being done on Labor Day and the engineers had tried to lash something together. It's this repair that failed and came down onto hte roadway.
There's no news as yet as to when the bridge might reopen: it's possible that it could be a long time as a replacement part is manufactured.