Mexico City is all kinds of big. It is the largest metropolitan area in North America, the largest Spanish-speaking city, and broadly one of the largest megacities in the world. Because of this, it can be, you know, hard to move around.
I remember visiting the city for the first time when I was in elementary school, and it standing out to me that everyone had one day of the week when they were simply not allowed to drive their car. It was/is a form of load balancing. Imagine that. (I don't know if this is still the case, or if it's even more stringent today.)
I also remember visiting the city later on, when I was in grad school, and it standing out to me that their metro had women-only cars. This was and continues to be an attempt to try and minimize the amount of sexual harassment that takes place on transit. Again, it can be hard to move around Mexico City.
The city's latest solution is one that has found success in other Latin American cities, such as Medellin, and that is: cable cars. Relative to subway or light rail, they're inexpensive. They're also good at navigating steep terrain, and their stations can be inserted into dense urban areas. This includes working-class neighborhoods who might otherwise have very limited mobility options.
For reasons like these, Mexico City has spent the last three years building three new cable car lines, the most recent of which opened just last month. The city now has the longest cable car line in the world. But more importantly, it has a new transit add-on that is moving up to 80,000 people per day.
This isn't as much as rail. But that's okay. The point of these lines is to bring more people closer in so that they can then connect to more services and other mobility options. And to do it quickly. Three new lines in three years is impressive. And from the sounds of it, it has transformed many people's lives for the better.
Here are maps of the 3 lines, zoomed out a bit so that you can see how they fit into the city's broader urban context: