S4
S4 at Frankfurt West station, bound for Kronberg
Overview
Type	Rapid transit, Commuter rail
System	S-Bahn Rhein-Main
Status	Operational
Locale	Frankfurt Rhine-Main
Termini	Kronberg Darmstadt Hauptbahnhof
Stations	22
Services	Kronberg Railway, Homburg Railway, Citytunnel Frankfurt, Main-Neckar Railway
Line number	4
Operation
Opening	28 May 1978 (1978-05-28)
Owner	Rhein-Main-Verkehrsverbund
Operator(s)	DB Regio
Depot(s)	Frankfurt Hbf
Rolling stock	DBAG Class 423
Technical
Line length	33.5 km (20.8 mi)
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge
Electrification	Overhead line
Route number	645.4

The S4 service of the S-Bahn Rhein-Main system bearing the KBS (German scheduled railway route) number 645.4

Routes[edit]

Kronberg Railway[edit]

Homburg Railway[edit]

City tunnel[edit]

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.

Main-Neckar Railway[edit]

History[edit]

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 eastern terminal.

Operation[edit]

S4 entering the Frankfurt Citytunnel

1. Kronberg – Langen
2. Frankfurt Hbf – Langen
3. Kronberg – Darmstadt Hbf (Sundays only)

S4			Journey time		Station		Transfer	S-Bahn service since
1	2	3
Main-Taunus-Kreis[edit]
			0			Kronberg		1978
			2	+2		Kronberg Süd		1999
			5	+3		Eschborn-Niederhöchstadt	S3	1978
			7	+2		Eschborn	S3	1978
			9	+2		Eschborn-Süd	S3	1978
Frankfurt am Main[edit]
			13	+4		Frankfurt-Rödelheim	S3 S5	1978
			16	+3		Frankfurt West	S3 S5 S6	1978
			18	+2		Frankfurt Messe	S3 S5 S6	1999
			20	+2		Frankfurt Galluswarte	S3 S5 S6	1978
			23	+3		Frankfurt Hbf (tief)	S1 S2 S3 S5 S6 S7 S8 S9 U4 U5	1978
			25	+2		Taunusanlage	S1 S2 S3 S5 S6 S8 S9	1978
			27	+2		Hauptwache	S1 S2 S3 S5 S6 S8 S9 U1 U2 U3 U6 U7 U7	1978
			28	+1		Konstablerwache	S1 S2 S3 S5 S6 S8 S9 U4 U5 U6 U7	1983
			30	+2		Ostendstraße	S1 S2 S3 S5 S6 S8 S9	1990
			32	+2		Frankfurt Lokalbahnhof	S3 S5 S6	1990
			34	+2		Frankfurt South Station	S3 S5 S6 U1 U2 U3 U7	1990
			36	+2		Frankfurt Stresemannallee	S3	1990
			38	+2		Frankfurt Louisa	S3	1997
Kreis Offenbach[edit]
			41	+3		Neu-Isenburg	S3	1997
			44	+3		Dreieich-Buchschlag	S3	1997
			46	+2		Langen Flugsicherung	S3	2002
			48	+2		Langen	S3	1997
			51	+3		Egelsbach		1997
Kreis Darmstadt-Dieburg[edit]
			53	+2		Erzhausen		1997
Darmstadt[edit]
			55	+2		Darmstadt-Wixhausen		1997
			57	+3		Darmstadt-Arheilgen		1997
			61	+3		Darmstadt Hbf		1997

External links[edit]

• traffiQ Frankfurt – S3/S4 timetable

Rhine-Main S-Bahn Services S1 S2 S3 S4 S5 S6 S7 S8 S9 Routes Frankfurt City Tunnel Offenbach City Tunnel Frankfurt Airport loop South Main S-Bahn Homburg Railway Kronberg Railway Limes Railway Main Railway Main-Lahn Railway Main-Neckar Railway Main–Weser Railway Offenbach-Bieber–Dietzenbach railway Riedbahn Rodgau Railway Taunus Railway