Wide streets are distinguished from boulevards largely by the absence of trees. Unlike boulevards, wide streets are a fairly standard fixture of streets, dating back probably at least to Roman times. Wide streets, as we treat them here, are also generally appreciably narrower than boulevards, although there is certainly some overlap. While boulevards may be as wide as 100 meters, streets are not usually wider than about 40 meters, although some of the samples in this chapter are certainly wider than that.
Unlike the boulevard, the wide street is very much an urban form. It makes no effort to disguise itself as nature. Wide streets are almost invariably the most important and busiest streets in a city. Commercial and governmental functions tend to cluster on them.
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