You chose which path to travel

Even with train tracks, you have a choice on which path to travel. It may not always appear so, especially with long, straight, seemingly endless stretches of track lying ahead of you. Those direction-changing elements are called 'switches', and they are there for changing directions.

You may have to wait a short while in order to find those switches. But you will come upon one sooner or later. It will always be your choice which direction you travel.