The traffic in Saigon is pretty nuts. As I mentioned in an earlier post many motorbike riders will drive up onto the sidewalk for a bit and then back into the street in an effort to get around a slow driver or other obstacle.
At uncontrolled intersections (and you’d be surprised at home many seemingly big intersections are uncontrolled) the traffic simply interweaves in all directions. If you want to cross the street at one of these intersections do so slowly, but deliberately, while watching the traffic. Riders and drivers will go around you. Don’t try to avoid them, let them avoid you. It seems crazy, but it works.