After checking all of the wiring connections, place the train on the siding.

Power up the setup and make sure the turnouts get switched to the siding, if not then just reverse the connections of the turnouts made with the motor driver. Also, make sure the train starts to move to forward direction. Reverse the feeder track's connection with the motor driver if the train moves in the wrong direction.

The project is complete, for now. You can tinker with the Arduino code to change the functionality of the layout, add more sidings, it's all customizable! I would love to know about any modifications you make to this project, let me know in the comments below. All the best!