answered:
Uh oh, yeah those tunnels need replacing way sooner than the current schedule
You know what's really fun!
We have like...no idea how those are still standing. Is it the Pennsy engineering team was just THAT good?! Maybe!!!! Is it dumb luck? ALSO MAYBE!!!!!!
But it's okay!!!!!! Let's make the waiting rooms nicer instead!!! And not add any more tunnels or infrastructure!!!!
I mean they are replacing the tunnels but the estimated completion date 2035 and the repairs of the current tunnels are going to finish in 2038