Those places all look to have been built way before the automobile was a thing. And while I agree with narrow streets, because they're safer and more aesthetica

Those places all look to have been built way before the automobile was a thing. And while I agree with narrow streets, because they're safer and more aesthetically pleasing etc, you can't ignore that transforming to that design will be a little disruptive in the near term. My point is that some of the great and beautiful narrow cobble stone streets in, say, Boston or Philly, to use US examples, weren't built to handle heavy street traffic. Transforming high volume automobile streets to the walkable ideal is inevitably going to cause some headaches.