[eemy]

Reviewing the talk page, it appears that there is one editor who is acting like a bit of a gatekeeper for the page. I appreciate what the person is doing, as the page would likely balloon with all sorts of examples that don't meet the qualifications of the metro (or at least the stated ones, I have all sorts of issues with trying to classify mass transit systems). That said, his stated reason for reverting your edit is inconsistent with the article itself, so his judgement is maybe a bit questionable.

In situations like this, it is better to hash it out in the talk page before trying to make an edit again (I added a section there). Even then, sometimes the wikipedia community makes boneheaded decisions. It is fair to say that any list article is going to be very problematic and it's often better to just move on and forget about it.