(Satellite) It is unusual to see a truss bridge used for a railroad overpass. Normally steel girders are used. According to the satellite image, the truss is still being used. Note that both railroads have fresh ballast. Metra seems to be doing a good job of maintaining routes they had to save from abandonment.
Kevin Piper posted The NS Manhattan Local heads back north over the old Rock Island at New Lenox, Illinois, on 4-2-91