That reminds me of when a new bridge was built across the Mississippi river between Illinois and Keokuk, Iowa (the home town of most of my family). There was a swing bridge when I was younger, and that bridge had metal grates like a catwalk. I stepped out onto it once when the bridge was open and it scared the s**t out of me. The new bridge is a lot nicer because it's tall enough that boats can go right under it, so cars never had to wait.
