From the article, the posted weight limit was 26 tons. A quick google search ("bus weight") shows that buses can easily exceed that limit and the bus on the bridge was a "double" bus.
Maybe the bus wasn't supposed to cross that bridge?
Blade tenderizing Prime beef is terrible and I hate that Costco does it (check the label before you buy), but my understanding is that if you cook via Sous Vide you don't need to take it to 160 degrees. You can cook it at a lower temperature (135/140) for a longer time and still kill harmful bacteria.
Maybe the bus wasn't supposed to cross that bridge?