Here’s a busy intersection in Hanoi with no traffic lights. I like the person at 0:58 seconds into the video who so casually walks into traffic.
Hanoi crazy night traffic from v!Nc3sl4s on Vimeo.
This further supports Hans Monderman’s concepts. Here is another video of an intersection without traffic lights. As a side note and reminder, letting people merge improves traffic flow (even if they cheated instead of waiting their turn).