Somewhere, deep within the bowels of the Metro tunnels lives the supercomputer that runs the trains. It keeps them running without (often) hitting other trains, it keeps the schedule on pace, and it powers those fancy clocks on each platform.
Unfortunately, it took a shit in the middle of Rush Hour.
Meaning that all the signals for the entirety of the Metro system are currently offline. Meaning it’s tough to move trains.
Did I mention that it gets kinda hot down in those stations? And the platforms get kinda full? Take a cab, if you haven’t left work yet.