Welcome Newguy!

I am not an engineer (heck, I barely passed high school math long ago), but I do know that many states have increased the maximum weight allowed on big rigs by thousands of pounds, and the traffic volume has increased GREATLY (in many cases well over triple) since many of the bridges in this country were constructed (which was quite a few years ago in the case of most of them). I can only wonder if this might have a bearing on the collapse of any bridge? And we must always keep in mind that ALL highways, bridges, etc, are built by the LOWEST BIDDER...