So I can't speak for commuter traffic in other cities (other than my brief time in GZ), but in Beijing, morning and evening rush hour subway rides have become unbearably crowded in the past month or so. What's weird about this situation is that the city just opened a bunch of new lines/extensions, which one would expect would make travel more convenient and relieve pressure from the already congested public transit system.

Wrong.

At least from what I'm seeing riding the subway every day, the new lines opening have actually caused crowding to worsen overall. Most notably, the line 10, which used to form a boomerang shape from north-west Beijing to south east Beijing and is now a nearly complete circle (it's still mysteriously missing two stops) is now INSANE during all hours of the day. I suspect this is because all of the people living in south Beijing who previously had no access to the subway now do, and are using it as much as possible now. 

Good for them, terrible for the rest of the city. who must deal with what is likely several million new subway commuters.