OK, so off topic somewhat in that this bridge is in Milwaukee County. Still, a cool idea.
http://www.jsonline.com/story/entertainment/arts/art-city/2016/10/25/ghost-train-evoke-shorewoods-locomotive-past/92470934/This bridge once carried passenger trains on the C&NW "Air Line" which ran from the old lakefront station in downtown Milwaukee to Fond du Lac. In the 1960s C&NW passenger trains were routed instead to the then new Milwaukee Road station on the south edge of downtown which they shared. The Air Line was then cut back to North Avenue and it served local industries with trains that backed down from Butler Yard.
It is now part of the Oak Leaf Trail within most of the Milwaukee area with the exception of a stretch that is operated by UP from the suburb of Granville up to West Bend and another segment from Fond du Lac south to Eden, WI.
For more on the C&NW Air Line Subdivision check out this excellent book-
http://cnwhs.org/shopping/product_info.php?cPath=22&products_id=395Tom
