Frankfurt-Sindlingen station
…Association, the predecessor of the Rhein-Main-Verkehrsverbund) introduced S-Bahn-like operations on the line, operating as line R 1; this was replaced by line S 1 in 1978. A major change came in 1980 when the level crossing was replaced by an underpass. In 2007, the long-planned Frankfurt-Zeilsheim station was…