Go to wanderu, which is like the expedia of trains and buses. It'll tell you the cheapest/best option and then you can go to that option's website and book it.

The blue line does go to New Carrollton until May. https://dcist.com/story/22/11/04/dc-new-blue-line-yellow-line-metro/

If you compare the DC-Baltimore CSA to the Philly-Wilmington CSA, then we're larger by more than 2.5million. And honestly comparing CSAs is probably the move, because all 9.9 million of us were snuffed out of a stadium, not just the DC-area ones. https://en.m.wikipedia.org/wiki/Combined_statistical_area

But honestly, I'd be even madder if I was in Chicago. 4th largest CSA and 3rd largest MSA, and there isn't even a good option nearby.

It's the same reason we call IAD and DCA Washington-Dulles and Washington-National, even though they're not in the district. Metlife serves NYC, so you can call it an NYC stadium. It's only a 14 minute drive from Manhattan anyways.

The crash wasn't because of ATO:

"WMATA disabled ATO on June 23, 2009 in a knee-jerk reaction after a Red Line train crashed into the back of another, killing eight riders and a train operator. ATO wasn’t at fault, but the underlying system that controls train locations and keeps them separated was." from https://ggwash.org/view/69545/metro-reasons-good-news-for-riders-computer-driven-trains-are-coming-back#:~:text=Metro%20had%20computer%2Ddriven%20trains,and%20keeps%20them%20separated%20was.

That crash likely would've happened regardless, since the drivers didn't have line of sight until it was too late, and the train operator behind wouldn't have been able to see that there was a train ahead of it any other way (because the problem had to do with the train location system).

These days, they'd likely have to put in GPS based tracking together with track-based tracking to ensure everything's going smoothly.