This was originally called Ferry Road a century ago.
We called this the Z bridge because of the way the road went on either side of it and the side rails started with the roads. In the 90's my church (Six Mile Baptist) always had hay rides in the fall and we went over it. We always stopped and anyone who didn't want to ride on the trailer could get off and walk across. When I was learning to drive in 95', I missed my turn taking the back way to church. My dad said, "Don't worry, there is another way to go." I kept driving and we came up on the Z bridge. I had an 88' AMC Eagle station wagon. My dad would not let me get out of driving over it since I missed my turn. I will never forget that.
I remember this bridge. I first drove across it in 1970 in my '66 Olds Cutlass. It creaked and squeaked (the bridge, not the car) and I was glad it was no longer than it was. It seemed due to collapse at any moment. Oddly, that didn't prevent me from subsequently crossing it numerous times always wondering if I would make it to the other end. I am surprised it survived as long as it did.