Snellfahrstrecke Köln-Aachen is a nice route to build upon as it's located near the Belgian boarder. The Belgian Train infrastructure is very interesting and a large one to include in this game. Train operator : NMBS/SNCB Rail operator: Infrabel With a large range of different trains divided in Push-pull coaches, EMU's, and locomotives (Electric and Diesel powered). This route would run from Aachen Hbf all the way to Brussels-South which is Belgium's international train hub. Brussels is a very sophisticated area coming close to Munchen hbf. With many signals and routes coming together here, which provides oppertunities for a lot of AI controlled trains and even services for local trains and the main high speed trains. So back to Aachen Hbf wich we already know is a stop for the ICE3m (br403) high speed train. This train (on this route) runs from Frankfurt (Main)Hbf to Brussels-South stopping at: Frankfurt Flughafen, Köln Hbf, Aachen Hbf crossing the border on a high speed line into Liège-Guillemins, Brussels-North and Brussels-South as final destination for this train. This also includes a power change on the border. Liège-Guillemins is the first station you meet in Belgium. From here the possibilities become much greater. Here we can look at the local trains from Belgium. Trains which also cover the high speed line to Brussels. When the ICE runs at 250km/h, the local InterCity trains will run at 200km/h over High Speed Line 2. This line starts slightly after the station called Ans and covers more than 60Km to Leuven where you meet a big station as well, the high speed trains always skip this station, only in some rare circumstances a Thalys (TGV) or ICE train will pick up passengers here. The local InterCity trains cover more stations starting in Liège-Guillemins and stopping at: Ans, Leuven, Brussels-North, Brussels-Central and Brussels-South and than moving further to the Belgian coast (Oostende) or Kortrijk. They also run back in the direction of Liège and going further to Eupen or Welkenraedt which is located in the German community of Belgium. As an extra branch you should include ordinary line 36 which is used for freight and local passenger services operated by frequent stopping trains and longer distance trains. Used by push-pull coaches such as the M4 and M6 coaches and pulled by locomotives such as the HLE27 (old and used for the M4 coaches), HLE18 and HLE19 (Modern loco used for the M6, M6-200, M7 (Newest double decker coaches made in both EMU and coach form, coach form can operated up to 200km/h), I10 and I11 coaches (can also be operated up to 200km/h). Also EMU's such as the MS80 a more classic already renovated EMU brought into service in the 80s. and MS09 which is a modern EMU from the desiro family. On line 36 we come across a lot more stations that can be covered all the way to Leuven and than every train included in this route will move onto Line 52 (Mainline across Brussels) to reach the end of this route. So a lot of possibilities to consider.