Searching for the Secret Platform

Here is a schematic of the station. The leading theory right now is that the secret platform is parallel to the blue line, on the opposite side of it from us right now, so that people transferring from 2 to 1 are walking over it.

This shows an overhead view of the station. I initially thought the secret platform would be directly forward of the green line, but this seems not to be the case.

There's construction down there.

I found what looks like a very old subway tunnel.

I didn't go farther than this.

Looked up the words spraypainted in dirt later. "Blasting."

Some heavy machinery.

It's Christmas underground.

My search continues. I've seen many of the depths of the station, but still no secret platform.