Translations:How to operate relay line block equipment/81/en

On double-track SBL lines, a change of direction allows trains to run in the opposite track under full technical protection. Here, SBL signals are also set up at the same intervals as in the regular track. Train movements in the opposite track are controlled as usual under the clear aspects of main signals. When entering the opposite track, the signal W24 is indicated at the interlocking-controlled main signal.