"The highways in North Korea are huge and carless. Planes could land there. You can even see kids playing in the middle of the road. Security is a major problem because children and old people are not used to seeing cars, so they cross over the roads at any time, without watching out for oncoming traffic. The only cars you can see sometimes on highways are military ones, and most of them are stopped by the side of road, broken down. Or you can also see brand new Mercedes cars belonging to the North Korean officials passing by at very high speeds."