Pedestrian bridge over Middlebelt Road, 19827 Middlebelt Road, Livonia, Michigan
Photo taken by Dwight Burdette
License: Creative Commons Attribution (CC BY)
View this photo at panoramio.com
BH Photo #337323
I think I did figure out these bridges are ca. 1960s to 1970s. Its not a Michigan design, I believe this style can be found out-of-state. Some company must have produced them.
The NBI shows 1931 but it has more errors than a Royals game. This looks a lot newer.
this bridge was not built in the 30's. it was installed in the late 60's