Excellent work and thanks again for your conversion to English.
If you are interested, you may want to check out another board SLOT CAR ILLUSTRATED
as there is an interesting post using a train system for control.
I am very interested in using your best lane concept but with the train digital control system. Any idea on the circuit required using this DC system? I don't thing you can use diodes in series with the power as this may interrupt the signal to the cars. Could you use some sort of light sensor instead?
I also believe you can use this system to trigger a manual lane change. Put an infrared light in the chassis of the car pointing down with an infrared sensor in the track. The digital control system should be able to allow you to turn the infrared light on in the car and as you pass over the sensor and trigger a lane change.