They often assume that the absence of a grid is evidence of the absence of planning. These same writers tend to associate grids with planning and design. Many writers on urban form seem predisposed towards the rigid grid form and often find grids where they exist only in an approximate form.
Changes are driven by a multitude of influences, of which the most important are: values, philosophy, systems of government, population size, artistic sensibility, design techniques, building methods, paving techniques, and transport technology. Patterns have changed frequently since the first cities were established 10,000 years ago. The pattern of streets and squares has a greater impact on a city than any other element of its arrangement. Crawford First published on December 2005 Abstract Crawford A Brief History of Urban Form Street Layout Through the Ages J.H. Carfree Cities: Articles: A Brief History of Urban Form: J.H.
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