Quoting Osubuckeyes (Reply 11):
In the article it says that there will be a tunnel. I doubt there will be a train. It will likely be just moving walkways a la DTW.
There used to be a short tunnel that the North/South road on the west side used to follow. It was closed when the west runways were built. THAT tunnel is west of where it would be needed for pax access.
Quoting slcguy (Reply 18):
Yes, a west tunnel connecting the north and south concourses has already been built.
See above...............I don't recall any other tunnels being built.
You are thinking of the roadway tunnels, there is an additional tunnel built about 8-10 years ago intended to connect the new concourses. Remember the big hole in a construction area west of the D and E concourse ramps back then? Only sign right now that it's there are some curved white ventilation pipes at both ends. Preliminary work for this new terminal complex started 15 years ago!