I found this over on Laughing Squid and thought it a great example of an organically-functioning co-operative system. Note the complete absence of traffic signals yet everything is flowing smoothly, no accidents, no road rage. Bicycles, buses, cars, scooters, pedestrians all safely traveling through the intersection. If only we had this in San Francisco, people it’d probably just fuck it up, though.
I doubt your optimism of the traffic situation is entirely correct. I haven’t back to Vietnam in 12 years but I know that traffic is terrible over there. Laws and rules work for a reason. Buses & motorbikes get overloaded with people, not yielding for pedestrians, private buses speeding to compete for passengers, overweight trucks going down roads that are weight-regulated, etc. It is not all fun and games over there.