Our knowledge of few places on earth is more deliberately obfuscated than is our knowledge of North Korea, and this site is confirmation of that fact.
The two definitely-known facts about the Pyongyang Metro are that it exists and people use it. As you read around the site, you'll learn that no definitive answer exists regarding even the number of lines (there are at least 2--that much is known), much less the total length of the system. Maps of the city don't indicate where the stations are. No one knows how many cars operate on the lines. Etc.
I find stuff like this utterly fascinating--and not a little -like. Maybe you will agree.
Edit: no need to obfuscate obfuscate by misspelling it.