That's not State. The Franklin/Shoppers Park headhouse leads down to the OL Oak Grove platform in DTX.
Data -- yes that's the unfortunate non part of this mega project
Perfect opportunity to do part of the project to interconnect Orange at DTX to Orange at State -- that would enable a Pedestrian direct walking interconnection from:
1) Green to Red (Park)
2) Green to Orange (Park; Winter St Concourse to DTX)
3) Green to Blue (Park; Winter St Concourse to DTX; Washington St. Concourse to State)
4) Red to Orange (DTX)
5) Red to Green (Park)
6) Red to Blue (DTX; Washington St. Concourse to State)
7) Orange to Red (DTX)
8) Orange to Blue (Washington St. Concourse to State)
9) Orange to Green (Winter St Concourse to Park)
10) Blue to Orange (State)
11) Blue to Red (State; Washington St. Concourse to DTX)
12) Blue to Green (State; Washington St. Concourse to DTX; Winter St Concourse to Park)
Eventually as part of the Govt Center rebuild I'd connect from Blue [Govt Cent] to Blue or Orange @[State]
This network would allow a much more robust system allowing for the shutdown of anyone of the Big 4 stations for maintenance or emergency without losing the core of the system
It would also generate enough foot traffic to have a Montreal or European-like underground shopping concourse inside the Charley Zone --- I'd call it the "Hub" and put it under Shoppers' Park corner of Franklin and Washington
Too Bad that its not happening now -- But there will be another chance when the old Wolworth's complex {Marshals today} gets redone in the next 20 years or so