The city streets are good for many things besides supporting the passage of vehicles; and sidewalks of the city - part of the street intended for pedestrians - have many other uses in addition to supporting the pedestrian walk. These uses are in close relation to the circulation, but do not identify with it, and in fact are at least as important as circulation for the proper functioning of cities. In itself, a city sidewalk is nothing. It is an abstraction. Only has meaning in relation to buildings and other ancillary services to or attached to other nearby sidewalks. It same could be said of the streets, in the sense that they serve to do more than support road traffic. The streets and sidewalks are the main public places of a city, its most vital organs. What is the first thing that comes to mind when thinking about a city? Their streets. When the streets of a city are of interest, the entire city is of interest, when have a sad, the whole city seems sad. And even more - and by that encounter the first problem - if the streets of a city are safe from barbarism and fear, the city is more or less tolerably safe from the barbarism and fear. When people say that a city or a part of it is dangerous or a jungle, he mostly means you do not feel safe in their sidewalks. But sidewalks and those who use them are not passive beneficiaries or victims without security hope of a hazard. Sidewalks (the utility they provide) and your users are active participants in the drama of civilization against barbarism taking place in cities. Maintain City Safety is main job of the streets and sidewalks of a city. It's a completely different task to the services that are called upon to provide sidewalks and streets of small towns or suburbs. The big cities are not only very large cities, nor are dense slums. They differ from towns and of the suburbs in essential respects, one of which is that cities are definition, full of strangers. Everyone knows that in the big cities there are more familiar strangers.
Question 2
In some wealthy neighborhoods where this type of self-monitoring is very precarious, as the residential Park Avenue or Fifth Avenue super wealthy New York, rented onlookers to do the job. The monotonous residential sidewalks Park Avenue, for example, are surprisingly uncrowded, its potential users crowd into change in sidewalks full of interesting shops, bars and restaurants on Lexington Avenue and Madison Avenue in the East and West, and crossings of other streets leading to the above. At night, the doormen are in his capacity as bastions and with this assurance I know there are stray dogs who venture to make the Pirro, who also has easements, becoming observers supplementary. But this street is bereft of their own eyes, devoid of specific reasons for someone to use ...