Saigon is a large city with more than 13 millions people. The main transportation here is motorbike and people are able to turn right when the traffic light turns red. It may make tourist afraid. There is good way for you to across the street that observe carefully around you then keep walking across the street cause the driver will move slowly at the back of you. You should not move, stop then move again that may make the driver confuse and easy to hit you accidentally.