S1 (Rhine-Main S-Bahn)

S1
S1 in Hochheim, bound for Wiesbaden
Overview
StatusOperational
OwnerDB Netz
LocaleFrankfurt Rhine-Main
Termini
Stations32
Service
TypeS-Bahn Rhein-Main (Rapid transit, Commuter rail)
Services
Route number645.1
Operator(s)DB Regio
Rolling stockDBAG Class 430
History
Opened28 May 1978 (1978-05-28)
Technical
Line length72.1 km (44.8 mi)
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
ElectrificationOverhead line

The S1 service of the S-Bahn Rhein-Main system bearing the KBS (German scheduled railway route) number 645.1 is an important railway connection running east–west. It operates between the Hesse state capital Wiesbaden and the southern Offenbach rural district serving the densely populated area along the Main river.

With a route length of over 70 km (43 mi), 30 stations and a journey time of 87 minutes, it is the longest S-Bahn service in the Rhine-Main area. The average speed of travel is about 49.72 km/h (30.9 mph) and a station distance of about 2 km (1.2 mi).

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