Neither pedestrian crowding nor travel distance is an issue in walkable cities, because public transit and cycling is compatible with a walkable city. There is

Neither pedestrian crowding nor travel distance is an issue in walkable cities, because public transit and cycling is compatible with a walkable city. There is nothing difficult about it, there exist thousands of walkable cities. Another concept you may learn about is „mixed used neighborhoods“. It turns out you dont have to separate out working and residential areas, this will reduce travel distances. A related concept is the „polycentric city“.