is reactivated today as part of the S2. With the transition to RMV, the marking of these routes as S-Bahn was omitted, which had become largely obsolete because of the network extensions. From the source network until today only the north-maine route from Frankfurt to Hanau was not integrated into the rapid-transit railway enterprise (at that time S7, today RMV-Linie 55). References External links Deutsche Bahn S-Bahn in Germany 15 kV AC railway electrification