Switch locking doesn't work. The AI-tram following me shifts the switch to sideways, which I have set for myself to drive straight ahead. Once the switch is set, it should be blocked until the first tram rolls off the switch completely. Only then should the next tram be able to reposition the switch. It is possible that this is why AI-trams get lost and go on routes that are not their own. AI-trams change switches not only to the player but also to other AI-trams ahead of them.