Somewhat against type, I've grudgingly concluded that creating pedestrian malls
is often a bad idea. That isn't to say that they can't work, but often removing cars from a street segment does end up destroying the local retail economy. It can work in places with significant local demand/density, but the idea of creating outdoor malls that people will drive to in urban areas is quite often a bad one. Tbere are successful examples, of course, but doing it right is tricky.