strangely, I think all the tunnel that was previously dug is to the north and south of the route that's being opened now. maybe not as much sunk cost as one mig

strangely, I think all the tunnel that was previously dug is to the north and south of the route that's being opened now. maybe not as much sunk cost as one might think. although it looks like they will use existing tunnel north of the route as a maintenance area / train yard. https://en.wikipedia.org/wiki/Second_Avenue_Subway#1960s.E2.80.931970s:_Original_construction_efforts https://en.wikipedia.org/wiki/Second_Avenue_Subway#1960s.E2....