S2 (Rhine-Main S-Bahn)

S2
DB class 423 as S2 heading for Niedernhausen passing Hofheim-Lorsbach
Overview
Status	Operational
Owner	Rhein-Main-Verkehrsverbund
Line number	2
Locale	Frankfurt Rhine-Main
Termini	Niedernhausen Dietzenbach
Stations	27
Service
Type	Rapid transit, Commuter rail
System	S-Bahn Rhein-Main
Services	Main-Lahn Railway Citytunnel Frankfurt, Frankfurt Schlachthof–Hanau railway Rodgau Railway Offenbach-Bieber–Dietzenbach railway
Route number	645.2
Operator(s)	DB Regio
Depot(s)	Frankfurt Hbf
Rolling stock	DBAG Class 423
History
Opened	28 May 1978 (1978-05-28)
Technical
Line length	54.7 km (34.0 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	Overhead line

The S2 service of the S-Bahn Rhein-Main system bearing the KBS (German scheduled railway route) number 645.2 is a railway connection between the small Taunus town Niedernhausen and Dietzenbach.

Usually DBAG Class 423 railcars are used on this service. Its predecessor class 420 is only used for shortened shuttle services.

According to a news report issued by Hessenschau, the S2 is the least punctual of the system, with only 83% of trains leaving on time.^[1]

The service uses the tracks of the Main-Lahn Railway between Niedernhausen and Frankfurt Central Station. This route is also used by regional trains in the section Niedernhausen–Frankfurt-Höchst. Between Frankfurt-Höchst and Central Station this service shares the Main-Lahn line with freight and shunting operations. National and regional services use the parallel running Taunus railway in this section. The Main-Lahn railway was completed on 15 October 1877 and has been used by S-Bahn services since 1978.

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). The tunnel was opened in four stages in 1978, 1983, 1990 and 1992. In a short section between Mühlberg and Offenbach-Kaiserlei the Frankfurt Schlachthof–Hanau railway is used. The section from Mühlberg to Offenbach Ost through the Offenbach City Tunnel was opened in 1995.

This line was opened in 1896 and has been used since 2003 only by S-Bahn services.

This line was opened on 1 December 1898 and has been used since 2003 only by S-Bahn services.

The S2 was one of the first six services of the Rhine-Main S-Bahn system. In a prior test operation it ran between Niedernhausen and Frankfurt Central Station. The service was then called R2 where the letter "R" stands for regional. In 1975 the R2 was the system's first service employing the class 420 trainset. After the opening of the Frankfurt Citytunnel the service was renamed to S2 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. After the opening of the eastern Citytunnel branch to the Mühlberg station in 1992 the S2 started operation in this section shutting down its service to Lokalbahnhof and Südbahnhof until in 1995 the service resumed its pre-1992 operation. In 2002, Eppstein-Bremthal station was completed increasing the number of stations to 18.

In 2003 the Offenbach Citytunnel and the Rodgau railway was included. After two years of construction work this route was changed to S-Bahn operation. Since then the new eastern terminal station is Dietzenbach. In 2007 the new Frankfurt-Zeilsheim station was included to the S2 service.

1. Niedernhausen – Dietzenbach
2. Niedernhausen – Offenbach Ost
3. Niedernhausen – Frankfurt Hbf
4. Hofheim – Frankfurt Hbf
5. Griesheim – Dietzenbach
6. Offenbach Ost – Dietzenbach

						Journey time		Station		Transfer	S-Bahn service since
1	2	3	4	5	6
Rheingau-Taunus-Kreis [edit]
						0			Niedernhausen		1978
Main-Taunus-Kreis [edit]
						3	+3		Eppstein-Niederjosbach		1978
						5	+2		Eppstein-Bremthal		2002
						7	+2		Eppstein		1978
						12	+5		Hofheim-Lorsbach		1978
						15	+3		Hofheim		1978
						18	+3		Kriftel		1978
Frankfurt am Main [edit]
						20	+2		Frankfurt-Zeilsheim		2007
						23	+3		Farbwerke		1978
						26	+3		Frankfurt-Höchst		1978
						28	+2		Frankfurt-Nied		1978
						31	+3		Frankfurt-Griesheim		1978
						37	+6		Frankfurt Hbf		1978
						36	+5		Frankfurt Hbf (tief)		1978
						38	+2		Taunusanlage		1978
						40	+2		Hauptwache		1978
						42	+2		Konstablerwache		1983
						43	+1		Ostendstraße		1990
						45	+2		Mühlberg		1992
Offenbach [edit]
						48	+3		Offenbach-Kaiserlei		1995
						50	+2		Ledermuseum		1995
						52	+2		Marktplatz		1995
						55	+3		Offenbach Ost		1995
						57	+3		Offenbach-Bieber		2003
Kreis Offenbach [edit]
						61	+4		Heusenstamm		2003
						64	+3		Dietzenbach-Steinberg		2003
						66	+2		Dietzenbach-Mitte		2003
						68	+2		Dietzenbach		2003

Wikimedia Commons has media related to S2 (S-Bahn Rhein-Main).

• traffiQ Frankfurt – S2 timetable^{[permanent dead link]}