The S4 service of the S-Bahn Rhein-Main system bearing the KBS (German scheduled railway route) number 645.4
Routes
Kronberg Railway
Homburg Railway
City tunnel
The city tunnel is an underground, pure S-Bahn route used by almost all services (except for the S7 service which terminates at the central station). In a short section between Mühlberg and Offenbach-Kaiserlei the South Main railway is used.
History Year Stations Route 1974 (R4) 6 Kronberg – Frankfurt Hbf 1978 10 (+4) Kronberg – Hauptwache 1983 11 (+1) Kronberg – Konstablerwache 1990 14 (+3) Kronberg – Frankfurt Süd 1997 19 (+5) Kronberg – Langen 1999 21 (+2) Kronberg – Langen 2002 22 (+1) Kronberg – Langen 2024 16 (-6) Kronberg – Frankfurt Süd
The S4 was one of the first six services of the Rhine-Main S-Bahn system. In a prior test operation it ran between Kronberg and Frankfurt Central Station. The service was then called R4 where the letter "R" stands for regional. After the opening of the Frankfurt Citytunnel the service was renamed to S4 and extended to the new Hauptwache underground station. Further extensions of the tunnel followed in 1983 (Konstablerwache) and 1990 (Ostendstraße and Lokalbahnhof) so that the Südbahnhof (South station) became the service's souther terminal.
From 1997 until 2024 the S4 rode from Kronberg to Langen.
Operation
Journey time Station Transfer S-Bahn servicesince Main-Taunus-Kreis 0 Kronberg 1978 2 +2 Kronberg Süd 1999 5 +3 Eschborn-Niederhöchstadt 1978 7 +2 Eschborn 1978 9 +2 Eschborn-Süd 1978 Frankfurt am Main 12 +3 Frankfurt-Rödelheim 1978 16 +4 Frankfurt West 1978 18 +2 Frankfurt Messe 1999 20 +2 Frankfurt Galluswarte 1978 23 +3 Frankfurt Hbf (tief) 1978 25 +2 Taunusanlage 1978 27 +2 Hauptwache 1978 28 +1 Konstablerwache 1983 30 +2 Ostendstraße 1990 32 +2 Frankfurt Lokalbahnhof 1990 33 +1 Frankfurt South Station 1990
External links
RMV Frankfurt – S3/S4 timetable