On one of my wandering-explorations of Hanoi, I found myself in a narrow walk-way with stalls selling clothing on either side. There was barely enough room for shoppers to navigate… which apparently meant that there was plenty of room for motorbikes to go through, attempting to pass each other in both directions. (With lots of honking when they inevitably found themselves stuck and waiting.)
When the roads get crowded (and they often do), I see motorbikes zoom through markets, over sidewalks, or down the wrong side of the road.
