If you’re happy to do plan ahead, there are still some S-Bahn services running. This website (in German) details which lines have been completely closed and which ones still run a train every 20 minutes. All other S-Bahn lines are running every 20 minutes with the exception of the S8 which is running every 40 mins. FrankfurtThe German finance capital is also seriously affected by strikes on both its S-Bahn and regional services. NRWA large number of regional and S-Bahn services in the west of the country have been completely stopped.

Source: The Local September 02, 2021 09:00 UTC