Exploring the unfinished lines on the Island of Sodor, how far can we go along them?

Today, as a change from driving to a timetable, I have decided to see just how far along the various branch lines that diverge from the Sodor Main Line I can actually get, initially starting by using a method where I put a long train just short of the invisible barrier and then try to go past the barrier that way, I quickly discovered that that's not actually possible with Wonders of Sodor but I did see how far it was before I went out of the playable area. Enjoy this look into most of the branch lines that (hopefully) will be available to drive along at some point in the future. Dale