Hi, when I select a track there are a few more options: X and Y. If I select anyone of them the big map is all highlighted, I don´t understand, can anyone explain?

Also which track is the one there is a large tunnel you go through?

thanks

X is open track. That mean you can go anywhere on whole map.
Y is same I guess

^ as he said, Y is for reverse direction

There are tunnels in Westhill and Rockingham.

Quote from neonmateo :

X is open track. That mean you can go anywhere on whole map.
Y is same I guess

thanks to all of you.