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

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 (R3)	11	Frankfurt-Höchst – Frankfurt Hbf
1978	15 (+4)	Frankfurt-Höchst – Hauptwache
1983	16 (+1)	Frankfurt-Höchst – Konstablerwache
1990	19 (+3)	Frankfurt-Höchst – Frankfurt Süd
1997	26 (+10, -3)	Bad Soden – Darmstadt Hbf
1999	27 (+1)	Bad Soden – Darmstadt Hbf
2002	28 (+1)	Bad Soden – Darmstadt Hbf
2008	29 (+1)	Bad Soden – Darmstadt Hbf

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 – Darmstadt Hbf
2. Frankfurt Hbf – Darmstadt Hbf
3. Bad Soden – Langen (Sundays only)

			Journey time		Station		Transfer	S-Bahn service since
1	2	3
Main-Taunus-Kreis
			0			Bad Soden		1978
			2	+2		Sulzbach Nord		1978
			5	+3		Schwalbach Limes		1978
			6	+1		Schwalbach Nord		2008
			9	+3		Eschborn-Niederhöchstadt		1978
			11	+2		Eschborn		1978
			13	+2		Eschborn-Süd		1978
Frankfurt am Main
			17	+4		Frankfurt-Rödelheim Frankfurt-Rödelheim station Frankfurt Rödelheim station is a regional and S-Bahn station in western Frankfurt am Main, Germany on the Homburg line, in the district of Rödelheim. The Kronberg line branches off the Homburg line north of the station and the junction with the Rebstock curve of the former Bad Nauheim–Wiesbaden...		1978
			20	+3		Frankfurt West Frankfurt West station Frankfurt West station is a regional and S-Bahn station in western Frankfurt am Main, Germany on the Main-Weser Railway, in the district of Bockenheim, near the Frankfurt Trade Fair grounds and the Bockenheim campus of the Goethe University Frankfurt....		1978
			22	+2		Frankfurt Messe Frankfurt Messe station Frankfurt Messe station is an S-Bahn station in Frankfurt am Main, Germany, in the district of Bockenheim in the middle of the Frankfurt Trade Fair grounds. The station was opened in 1999 to improve the fair’s public transport connections. It consists of two platform tracks facing a central platform...		1999
			24	+2		Frankfurt Galluswarte Frankfurt Galluswarte station Frankfurt Galluswarte station is an S-Bahn station to the west of central Frankfurt am Main, Germany, in the district of Gallus.The station was opened on 28 May 1978 and is named after a nearby medieval watchtower, which was named after the Galgenfeld...		1978
			27	+3		Frankfurt Hbf (tief)		1978
			29	+2		Taunusanlage		1978
			31	+2		Hauptwache		1978
			32	+1		Konstablerwache		1983
			34	+2		Ostendstraße		1990
			36	+2		Frankfurt Lokalbahnhof Frankfurt Lokalbahnhof Frankfurt Lokalbahnhof is an underground S-Bahn station in the district of Sachsenhausen of Frankfurt am Main, Germany. The station was opened when the City Tunnel was extended to Frankfurt South station in 1990. It consists of two tracks, surrounding a central platform.The station is an important...		1990
			38	+2		Frankfurt South Station		1990
			40	+2		Frankfurt Stresemannallee		1990
			42	+2		Frankfurt Louisa		1997
Kreis Offenbach
			45	+3		Neu-Isenburg		1997
			48	+3		Dreieich-Buchschlag		1997
			50	+2		Langen Flugsicherung		2002
			52	+2		Langen		1997
			55	+3		Egelsbach		1997
Kreis Darmstadt-Dieburg
			57	+2		Erzhausen		1997
Darmstadt
			59	+2		Darmstadt-Wixhausen		1997
			62	+3		Darmstadt-Arheilgen		1997
			65	+3		Darmstadt Hbf Darmstadt Hauptbahnhof is the Hauptbahnhof of the German city Darmstadt. After Frankfurt Hbf and Wiesbaden Hbf, it is the third largest station in the state of Hesse. It is the second busiest station in Hesse, servicing 35 000 passengers and 220 trains per day....		1997

External links

• traffiQ Frankfurt – S3/S4 timetable