Take a look at the sidewalks. See the drop from the sidewalk into the street? If you stood in the extremely super narrow street, the sidewalk would come up to your shins, depending on how tall you are.
The city planners were actually quite thoughtful for pedestrians (or donkey owners).
Fun fact: The donkeys would walk in the street … and the human would walk alongside their donkey on the elevated sidewalk as to avoid stepping in the donkey’s poop.