Oh yeah, forgot about them ... ever see those pictures of downtown Pyongyang? Beautiful western looking buildings - and female traffic cops with no traffic to control. Blank empty streets with maybe a few trucks here and there ....
Here's something a bit more tell. Bring up Google Earth and look at Seoul. By the shadows from the buildings it appears the satellite picture was taken in the afternoon. You'll see the normal urban traffic (three traffic jams if you look hard enough), but nothing out of the ordinary for a capital city. Now look at Pyongyang. The shadows are identical, yet there are extremely few cars on the road. This picture says a thousand word.