The problem of derailment in Altenburg Siding 2231 2232 2233 2234 2235 not be solved by changing the buffer (SAD Prellbock Kollisions-Patch v.v1- http://rail-sim.de/railsimnew/…rellbock-kollisions-patch ) but lengthening the track. Here is the solution that I have been found. Now you can access those tracks (Locomotive AI) without derailing.