Regarding Frankfurt on the 7th of November

https://www.deutschebahn.com/pr-frankfurt-de/Softwareupdate-im-elektronischen-Stellwerk-Samstagabend-bis-Sonntagnachmittag-keine-S-Bahnen-im-Frankfurter-City-Tunnel-5702884?contentId=1306570

This was announced on the 3rd of November.

Software update in the electronic signal box: No suburban trains in Frankfurt's city tunnel from Saturday evening to Sunday afternoon

The Frankfurt City-Tunnel between the main station and Offenbach-Kaiserlei cannot be used by suburban trains from Saturday, November 7, 7 p.m., to Sunday, November 8, 2:30 p.m. The reason for this is a necessary software change in the electronic interlocking (ESTW). The break in traffic will also be used to carry out conversion work on the control and safety technology in the tunnel.

During this time, the S-Bahn trains bypass the City Tunnel or are not operated between Frankfurt Central Station and Frankfurt South or Offenbach. A rail replacement service with buses is available for passengers. In addition, VGF is increasing its metro service and is running additional cars on the U1, U2 and U4 lines. The Frankfurt transport company traffiQ also accepts DB tickets during the closure period.