LEGO train track setup with a huge 2level bridge & automated switches.

Installed rails:
383 straight rails (16 studs)
50 straight rails (32 studs)
660 curves R40
48 curves R56
64 curves R72
8 curves R88
8 curves R104
33 switches
14 train crossings
248 flexible rails
In total more than 160 meter of rails for 13 trains.

13 of the switches are controlled automatically by Mindstorms (3x31313 and 2x51515) or powered up hubs (3xTechnic Hub, 1xCity Hub), i. e. trains are detected by infrared/ distance sensors which causes the switch to change direction randomly. The EV3s change the direction just when detecting an incoming train (rising edge), all other robots wait until the train passed the sensor (and the switch) completely and changes the direction afterwards (falling edge). The powered up hubs are programmed using Pybricks (https://pybricks.com). See https://github.com/Tegowalik/LEGOSwi... for more information.

Multiple trains (those with a lot of wagons) are using 2 powered up motors (see    • LEGO Powered Up Tutorial | How to pro...   and https://github.com/Tegowalik/Pybricks... for more information).

Most of the non Lego wagons and rails can be bought here: https://www.bluebrixx.com