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S3
S3 towards Bad Soden at Frankfurt (Main) Süd
Overview
Status	Operational
Owner	Rhein-Main-Verkehrsverbund
Line number	3
Locale	Frankfurt Rhine-Main
Termini	Bad Soden Frankfurt-Süd
Stations	18
Service
Type	Rapid transit, Commuter rail
System	S-Bahn Rhein-Main
Services	Limes Railway, Homburg Railway, Citytunnel Frankfurt
Route number	645.3
Operator(s)	DB Regio
Depot(s)	Frankfurt Hbf
Rolling stock	DBAG Class 423
History
Opened	28 May 1978 (1978-05-28)
Technical
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	Overhead line

The S3 service of the S-Bahn Rhein-Main system bearing the KBS (German scheduled railway route) number 645.3

Lines

Limes 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).

History

The S3 was one of the first six services of the Rhine-Main S-Bahn system. In a prior test operation it ran between Frankfurt-Höchst and Frankfurt Central Station. The service was then called R3 where the letter "R" stands for regional. After the opening of the Frankfurt Citytunnel the service was renamed to S3 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

1. Bad Soden – Frankfurt Süd

	Journey time		Station		Transfer	S-Bahn service since
1
Main-Taunus-Kreis
	0			Bad Soden		1978
	2	+2		Sulzbach Nord		1978
	4	+2		Schwalbach Limes		1978
	6	+2		Schwalbach Nord		2008
	8	+2		Eschborn-Niederhöchstadt		1978
	10	+2		Eschborn		1978
	12	+2		Eschborn-Süd		1978
Frankfurt am Main
	15	+3		Frankfurt-Rödelheim		1978
	19	+4		Frankfurt West		1978
	21	+2		Frankfurt Messe		1999
	23	+2		Frankfurt Galluswarte		1978
	26	+3		Frankfurt Hbf (tief)		1978
	28	+2		Taunusanlage		1978
	30	+2		Hauptwache		1978
	31	+1		Konstablerwache		1983
	33	+2		Ostendstraße		1990
	35	+2		Frankfurt Lokalbahnhof		1990
	36	+1		Frankfurt South Station		1990

External links

• RMV – S3/S4 timetable

v t e Rhine-Main S-Bahn
Services
Routes	Frankfurt City Tunnel Offenbach City Tunnel Frankfurt Airport loop Frankfurt Schlachthof–Hanau railway Homburg Railway Kronberg Railway Limes Railway Main Railway Main-Lahn Railway Main-Neckar Railway Main–Weser Railway Offenbach-Bieber–Dietzenbach railway Mannheim–Frankfurt railway Rodgau Railway Taunus Railway

• Rhine-Main S-Bahn