Very nice - thanks @hagrid67 . This graphic looks excellent. It could help to improve RL. Because we can see “flows” of agents in a very precise way. And we may be able to include this information into tree observation. The current tree observation just scans forward (in the direction of travel), but now we can also get information about the incoming traffic at switchs in very accurate way. This might be important information to avoid overfilling which can lead into “unpredictable” deadlocks (traffic jam issue).