Några saker att utgå från är ju det som redan Jane Jacobs konstaterade i sin bok:
The generators of diversity:
To generate exuberant diversity in a city's streets and districts, four conditions are indispensable:
1. The district, and indeed as many of its internal parts as possible, must serve more than one primary function; preferably more than two. These must insure the presence of people who go outdoors on different schedules and are in the place for different purposes, but who are able to use many facilities in common.
2. Most blocks must be short; that is, streets and opportunities to turn corners must be frequent.
3. The district must mingle buildings that vary in age and condition; including a good proportion of old ones so that they vary in the economic yield they must produce. This mingling must be fairly close-grained.
Min notering: Detta har primärt med prislägen att göra, inte i ett egenvärde av att byggnaderna är äldre i sig.
4. There must be sufficiently dense concentration of people, for whatever purposes they may be there. This includes dense concentrations ... of people who are there because of residence.
The necessity for these four conditions is the most important point this book has to make. In combination, these conditions create effective economic pools of use.
Some myths about diversity:
Lack of wide ranges of concentrated diversity can put people into automobiles for almost all their needs. The spaces required for roads and for parking spread everything out still farther, and lead to still greater uses of vehicles. This is tolerable where the population is thinly spread. It becomes an intolerable condition, destructive of all other values and all other aspects of convenience, where populations are heavy or continuous.
In dense, diversified city areas, people still walk, an activity that is impractical in suburbs and in most grey areas. The more intensely various and close-grained the diversity in an area, the more walking. Even people who come into a lively, diverse area from outside, whether by car or by public transportation, walk when they get there.
Erosion of Cities or attrition of automobiles:
Too much dependence on private automobiles and city concentration of use are incompatible. One or the other has to give.
Senast ändrad 4 augusti 2008 01:09