Bike riding in Vietnam

My big brother just came back from a bike ride with Barbara and he was white as a ghost (which is hard to become when you are opaque).  I have spoken of the traffic before, but I have not told you the method for crossing the street when you need to travel in the opposite direction. Hint: It does not involve making a left turn across traffic.  Most streets do not flow to a traffic signal, and people do not stop for us when we want to cross the street, so how do you think it is done?  Any guesses?  Only one choice is left to us.  We must travel down the street the wrong way, against traffic, dodging those coming toward us, until we can merge into the traffic in the lane which is going our direction. Bicycles, motorbikes, cars, they all use this method of travel.  It sounds and looks dangerous but think about it, it works very well because everyone can see each other.