The Jefferson Avenue Footbridge, built in 1902, is located in Lebanon, Missouri. The St Louis-San Franciso Railway was concerned for the people who would cross the railroad tracks to get to the businesses on Commercial Street and thus the bridge was built. Click to enlarge the photo.
The bridge spans 562 feet from one end to the other, making it one of the longest pedestrian bridges in the country.
I could imagine how dangerous it would be to cross this train yard with 13 railroad tracks!
For more bridges, visit Louis.