The bridge was part of a major road at the time connecting Grandview Missouri with the county seat in Independence. It cut the travel time between the two by several hours. Important for a young man from Grandview who had just purchased his first car so that he could drive to Independence to visit his girlfriend. The young man was Harry Truman and his girlfriend was Bess.
The line is now owned by Jackson County. Work is slated to begin next year to convert it into a trail. Here is a Youtube of want they want to do https://www.youtube.com/watch?v=sNv9iphvRoQ. This bridge is at about the 2 minute mark. It continues all the way to 59th Street.
Link to an undated photo showing roughly the same scene as the first street view. The bridge is visible between the station and train. The train is facing toward Lee's Summit, east on the line.
http://raytownhistoricalsociety.org/sitebuildercontent/siteb...
Here is a link to a historical photo of the bridge. This is taken from the top of the bridge looking north and, as near as I can tell, in about the 1940s:
http://raytownchamber.com/wp-content/uploads/2010/01/history...
Some of the houses & buildings in the photo are still there and none date from before 1940. Cars and trucks appear to match that approximate date as well. With the wagons and such this might be a special event like a Fourth of July parade.