We decided to play the 3rd option since that was the true definition of contiguous, plus that would seem how a railway would evolve anyway.
But would like to know what Mr Bohrer was after.
Exactly that, Mr Hazlett. The true definition of contiguous and how a railway would evolve anyway.
Your question was very interesting, as it happens; it supplied a useful rules modification for my AoS: Peru expansion map. Thank you!