On the way to work, I crossed some railroad tracks then heard a thud and dragging noises behind me. I thought I popped a tire or something, but when I stopped and looked behind me, I saw my rack had broken the upper zip-tie mount that had held for years and rotated around the lower mounts.
I was far enough from home I didn't want to go back, so it was time to get creative. I looked around and saw a piece of electrical cord in the gutter, which I then used to tie the rack in place. It's probably stronger now than ever, and I just might keep it this way.