S1 is a light blue color, 43-mile, and 32 station route (the longest commuter rail in the Frankfurt area), already started on May 28th, 1978, a very important railway connection east-west side of the city between Rodermark-Ober Roden & Wiesbaden. With 7 operation routes, some of them will run shuttle services (4 & 7) & some trains will run between Hochheim or Frankfurt-Hochst & Rodermark-Ober Roden. The Offenbach City Tunnel is used on all four lines (S1, S2, S8 & S9) between Offenbach-Kaiserlei on the east side & Frankfurt-Hochst on the west side. With BR423 (full-length route) & 420 (four-car shuttle) fleets. Frequency: S1 trains will run every half-hour. For more info, go to... https://wikipedia.org/wiki/S1_(Rhine-Main_S-Bahn)
Excellent idea and for this route the HMA DB BR420 can be layered here as the S8/S9 services. For timetable mode the HMA DB BR420 can operate the S1 service
