With “Did you know?”, we’re starting a new small DevLog series where we occasionally take a closer look behind the scenes of SubwaySim 2. In this format, we want to highlight internal systems and processes that are not always immediately visible during normal gameplay, but have a significant impact on how the simulation feels. These posts won’t appear every week, but only from time to time, whenever there’s a topic that’s worth a deeper explanation.
Today, we’re talking about something many of you have probably experienced without even realizing it: train circulation planning.
A lot of players have already spent many hours driving scheduled services in the simulator. At first glance, it may seem like a simple timetable where a train is told to go from point A to point B. However, what happens in the background is far more complex. In SubwaySim 2, trains do not just operate isolated timetable runs — the game features a fully planned circulation system.
This means that every train has a clearly defined schedule throughout the day. It is precisely determined where each train is at any given time, when it enters service, and when it leaves operation again. Trains don’t simply appear out of nowhere or disappear once a run is completed. Instead, they follow a consistent daily routine, just like in real-world subway operations.
This approach is essential for creating a believable network. It allows for realistic use of turnback tracks, depots, and sidings, and ensures that capacity limits are respected. At the same time, it makes the overall operation feel coherent and authentic over the course of an entire day.
One of the most interesting details becomes apparent when you simply observe the system in action. If you spend a full day at stations like Warschauer Straße or Barmbek and watch the train sequence from early morning until late in the evening, you’ll notice that the same trains keep returning. A train that leaves the depot in the morning will reappear throughout the day and eventually make its way back to the depot at the end of service.
This is a good example of how much more there is behind the timetable and career modes of SubwaySim 2 than it might seem at first glance. It’s all part of our goal to deliver a subway simulation that focuses on maximum operational authenticity, not just individual trips stitched together.
If you’d like to learn more about circulation planning, or if you’re interested in how such systems can be implemented on custom modding maps, you’ll find detailed information in our SubwaySim Wiki. Feel free to take a look.
About SubwaySim 2
SubwaySim 2 is available on PC, PlayStation 5, and Xbox Series X/S. We’d love to hear your thoughts in the Steam Discussions, on our Discord server, or via Instagram. Also check out the game on the PlayStation Store, Xbox Store, or Epic Games Store!