That bridge ain't so tough. Its got a steel beam protecting it. Here's a bridge that's one tough hombre. I saw this in a highway design class awhile ago. The backstory is that the highway and bridge weren't even opened to the public yet and the contractor was transporting equipment from one end of the job to the other. Evidently they either didn't load the long arm track hoe correctly or maybe it needed to be partially disassembled for transport, either way it didn't go well. You can see from the pics that the truck and trailer were traveling on the wrong side of the road, no big deal on a closed road, but you can see that the clearance signs aren't even posted yet. No excused because traveling the wrong direction you wouldn't see them anyway, but man can you imagine making that phone call?
http://flic.kr/p/tZEF8
Be sure to scroll to see all the pics of the carnage.