Hanoi Old Quarter has the scariest traffic I ever encountered. It is chaotic like Phnom Penh, only massively crowded with too-small streets. All sorts of traffic move at every which direction. Pedestrian, rickshaws, vehicular, motorcycle, bicycle, and whatever else that can move. There never is a break enough to cross the road in peace. The only strategy one can employ is to just go. Just walk at a slow steady pace, don’t make eye contact, and everyone will somehow move around you.
In an attempt to help you visualize… I present you both a video (taken by me) and a nice composite of photos taken and put together by my brother.