[W. K. Lis]

...and to that respect, I don't think they're any runnels in any stairwell related to GO, for bad or good. Least I don't remember seeing any.

The shadows in the photos makes it hard to discern. Maybe "temporary" or to be added later (which could be done to existing stairwells).

 

[TossYourJacket]

The good news is that it's not exactly difficult to improve the tunnel in the future. Yeah this is disappointing, but it's fixable.

 

[Towered]

I hate taggers with a passion, but I'd turn a blind eye if they went to town on this embarrassment.

 

[UtakataNoAnnex]

The shadows in the photos makes it hard to discern. Maybe "temporary" or to be added later (which could be done to existing stairwells).

There's nothing hiding in the shadows here I'm afraid. (And also sorry, Mr. Towered. )