- urban planning
n.the study or profession dealing with the growth and functioning of cities and towns, including environmental concerns, zoning, the infrastructure, etc.urban plannern.
* * *Programs pursued as a means of improving the urban environment and achieving certain social and economic objectives.Evidence of urban planning can be found in the ruins of ancient cities, including orderly street systems and conduits for water and sewage. During the Renaissance, European city areas were consciously planned to achieve circulation of the populace and provide fortification against invasion. Such concepts were exported to the New World, where William Penn, in founding the city of Philadelphia, developed the standard gridiron planthe laying out of streets and plots of land adaptable to rapid change in land use. Modern urban planning and redevelopment arose in response to the disorder and squalor of the slums created by the Industrial Revolution. The urban planner best known for his transformation of Paris was Georges-Eugène Haussmann. City planners imposed regulatory laws establishing standards for housing, sanitation, water supply, sewage, and public health conditions, and introduced parks and playgrounds into congested city neighbourhoods. In the 20th century, zoningthe regulation of building activity according to use and locationcame to be a key tool for city planners. See also Pierre-Charles L'Enfant.
* * *Introductiondesign and regulation of the uses of space that focus on the physical form, economic functions, and social impacts of the urban environment and on the location of different activities within it. Because urban planning draws upon engineering, architectural (architecture), and social and political concerns, it is variously a technical profession, an endeavour involving political will and public participation, and an academic discipline. Urban planning concerns itself with both the development of open land (“greenfields sites”) and the revitalization of existing parts of the city, thereby involving goal setting, data collection and analysis, forecasting, design, strategic thinking, and public consultation. Increasingly, the technology of geographic information systems ( GIS) has been used to map the existing urban system and to project the consequences of changes. In the late 20th century the term sustainable development came to represent an ideal outcome in the sum of all planning goals. As advocated by the United Nations-sponsored World Commission on Environment and Development in Our Common Future (1987), sustainability refers to “development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” While there is widespread consensus on this general goal, most major planning decisions involve trade-offs between subsidiary objectives and thus frequently involve conflict.The modern origins of urban planning lie in a social movement for urban reform that arose in the latter part of the 19th century as a reaction against the disorder of the industrial city. Many visionaries of the period sought an ideal city, yet practical considerations of adequate sanitation, movement of goods and people, and provision of amenities also drove the desire for planning. Contemporary planners seek to balance the conflicting demands of social equity, economic growth, environmental sensitivity, and aesthetic appeal. The result of the planning process may be a formal master plan for an entire city or metropolitan area, a neighbourhood plan, a project plan, or a set of policy alternatives. Successful implementation of a plan usually requires entrepreneurship and political astuteness on the part of planners and their sponsors, despite efforts to insulate planning from politics. While based in government, planning increasingly involves private-sector participation in “public-private partnerships.”Urban planning emerged as a scholarly discipline in the 1900s. In Great Britain the first academic planning program began at the University of Liverpool in 1909, and the first North American program was established at Harvard University in 1924. It is primarily taught at the postgraduate level, and its curriculum varies widely from one university to another. Some programs maintain the traditional emphasis on physical design and land use; others, especially those that grant doctoral degrees, are oriented toward the social sciences. The discipline's theoretical core, being somewhat amorphous, is better defined by the issues it addresses than by any dominant paradigm or prescriptive approach. Representative issues especially concern the recognition of a public interest and how it should be determined, the physical and social character of the ideal city, the possibility of achieving change in accordance with consciously determined goals, the extent to which consensus on goals is attainable through communication, the role of citizens versus public officials and private investors in shaping the city, and, on a methodological level, the appropriateness of quantitative analysis and the “rational model” of decision making (discussed below). Most degree programs in urban planning consist principally of applied courses on topics ranging from environmental policy to transportation planning to housing and community economic development.The development of urban planningEarly historyEvidence of planning has been unearthed in the ruins of cities in China, India, Egypt, Asia Minor, the Mediterranean world, and South and Central America. Early examples of efforts toward planned urban development include orderly street systems that are rectilinear and sometimes radial; division of a city into specialized functional quarters; development of commanding central sites for palaces, temples, and civic buildings; and advanced systems of fortification, water supply, and drainage. Most of the evidence is in smaller cities that were built in comparatively short periods as colonies. Often the central cities of ancient states grew to substantial size before they achieved governments capable of imposing controls.For several centuries during the Middle Ages, there was little building of cities in Europe. Eventually towns grew up as centres of church or feudal authority, of marketing or trade. As the urban population grew, the constriction caused by walls and fortifications led to overcrowding, the blocking out of air and light, and very poor sanitation. Certain quarters of the cities, either by custom or fiat, were restricted to different nationalities, classes, or trades, as still occurs in many contemporary cities of the developing world.The physical form of medieval and Renaissance towns and cities followed the pattern of the village, spreading along a street or a crossroads in circular patterns or in irregular shapes, though rectangular patterns tended to characterize some of the newer towns. Most streets were little more than footpaths—more a medium for communication than for transportation—and even in major European cities paving was not widely introduced before the 12th century (1184 in Paris, 1235 in Florence, and 1300 in Lübeck). As the population of the city grew, walls were often expanded, but few cities at the time exceeded a mile in length. Sometimes sites were changed, as in Lübeck, and many new cities emerged with increasing population—frequently about one day's walk apart. Towns ranged in population from several hundred to perhaps 40,000 (as in London in the late 14th century, although London's population had been as high as 80,000 before the arrival of the Black Death). Paris and Venice were exceptions, reaching 100,000.Conscious attempts to plan cities reemerged in Europe during the Renaissance. Although these efforts partly aimed at improving circulation and providing military defense, their prime objective was often the glorification of a ruler or a state. From the 16th century to the end of the 18th, many cities were laid out and built with monumental splendour. The result may have pleased and inspired the citizens, but it rarely contributed to their health, to the comfort of their homes, or to efficiency in manufacturing, distribution, and marketing.The New World absorbed the planning concepts of European absolutism to only a limited degree. Pierre L'Enfant (L'Enfant, Pierre-Charles)'s grandiose plan for Washington, D.C. (1791), exemplified this transference, as did later City Beautiful projects, which aimed for grandeur in the siting of public buildings but exhibited less concern for the efficiency of residential, commercial, and industrial development. More influential on the layout of U.S. cities, however, was the rigid grid plan of Philadelphia, designed by William Penn (Penn, William) (1682). This plan traveled west with the pioneers, since it was the simplest method of dividing surveyed territory. Although it took no cognizance of topography, it facilitated the development of land markets by establishing standard-sized lots that could be easily bought and sold—even sight unseen.In much of the world, city plans were based on the concept of a centrally located public space. The plans differed, however, in their prescriptions for residential development. In the United States the New England town grew around a central commons; initially a pasture, it provided a focus of community life and a site for a meetinghouse, tavern, smithy, and shops and was later reproduced in the central squares of cities and towns throughout the country. Also from the New England town came the tradition of the freestanding single-family house that became the norm for most metropolitan areas (metropolitan area). The central plaza, place, or square provided a focal point for European city plans as well. In contrast to American residential development, though, European domestic architecture was dominated by the attached house, while elsewhere in the world the marketplace or bazaar rather than an open space acted as the cynosure of cities. Courtyard-style domiciles characterized the Mediterranean region, while compounds of small houses fenced off from the street formed many African and Asian settlements. (See atrium.)The era of industrializationIn both Europe and the United States, the surge of industry during the mid- and late 19th century was accompanied by rapid population growth, unfettered business enterprise, great speculative profits, and public failures in managing the unwanted physical consequences of development. Giant sprawling cities developed during this era, exhibiting the luxuries of wealth and the meanness of poverty in sharp juxtaposition. Eventually the corruption and exploitation of the era gave rise to the Progressive movement (United States), of which city planning formed a part. The slums, congestion, disorder, ugliness, and threat of disease provoked a reaction in which sanitation improvement was the first demand. Significant betterment of public health resulted from engineering improvements in water supply (water-supply system) and sewerage (sewage system), which were essential to the further growth of urban populations. Later in the century the first housing reform measures were enacted. The early regulatory laws (such as Great Britain's Public Health Act of 1848 and the New York State Tenement House Act of 1879) set minimal standards for housing construction. Implementation, however, occurred only slowly, as governments did not provide funding for upgrading existing dwellings, nor did the minimal rent-paying ability of slum dwellers offer incentives for landlords to improve their buildings. Nevertheless, housing improvement occurred as new structures were erected, and new legislation continued to raise standards, often in response to the exposés of investigators and activists such as Jacob Riis (Riis, Jacob A) in the United States and Charles Booth (Booth, Charles) in England.Also during the Progressive era, which extended through the early 20th century, efforts to improve the urban environment emerged from recognition of the need for recreation. Parks (park) were developed to provide visual relief and places for healthful play or relaxation. Later, playgrounds were carved out in congested areas, and facilities for games and sports were established not only for children but also for adults, whose workdays gradually shortened. Supporters of the parks movement believed that the opportunity for outdoor recreation would have a civilizing effect on the working classes, who were otherwise consigned to overcrowded housing and unhealthful workplaces. New York's Central Park, envisioned in the 1850s and designed by architects Calvert Vaux and Frederick Law Olmsted (Olmsted, Frederick Law), became a widely imitated model. Among its contributions were the separation of pedestrian and vehicular traffic, the creation of a romantic landscape within the heart of the city, and a demonstration that the creation of parks could greatly enhance real-estate values in their surroundings. (See landscape architecture.)Concern for the appearance of the city had long been manifest in Europe, in the imperial tradition of court and palace and in the central plazas and great buildings of church and state. In Paris during the Second Empire (France) (1852–70), Georges-Eugène, Baron Haussmann (Haussmann, Georges-Eugène, Baron), became the greatest of the planners on a grand scale, advocating straight arterial boulevards, advantageous vistas, and a symmetry of squares and radiating roads. The resulting urban form was widely emulated throughout the rest of continental Europe. Haussmann's efforts went well beyond beautification, however; essentially they broke down the barriers to commerce presented by medieval Paris, modernizing the city so as to enable the efficient transportation of goods as well as the rapid mobilization of military troops. His designs involved the demolition of antiquated tenement structures and their replacement by new apartment houses intended for a wealthier clientele, the construction of transportation corridors and commercial space that broke up residential neighbourhoods, and the displacement of poor people from centrally located areas. Haussmann's methods provided a template by which urban redevelopment programs would operate in Europe and the United States until nearly the end of the 20th century, and they would extend their influence in much of the developing world after that.As the grandeur of the European vision took root in the United States through the City Beautiful movement, its showpiece became the World's Columbian Exposition of 1893, developed in Chicago according to principles set out by American architect Daniel Burnham (Burnham, Daniel H.). The architectural style of the exposition established an ideal that many cities imitated. Thus, the archetype of the City Beautiful—characterized by grand malls and majestically sited civic buildings in Greco-Roman architecture—was replicated in civic centres and boulevards throughout the country, contrasting with and in protest against the surrounding disorder and ugliness. However, diffusion of the model in the United States was limited by the much more restricted power of the state (in contrast to European counterparts) and by the City Beautiful model's weak potential for enhancing businesses' profitability.Whereas Haussmann's approach was especially influential on the European continent and in the design of American civic centres, it was the utopian concept of the garden city, first described by British social reformer Ebenezer Howard (Howard, Sir Ebenezer) in his book Garden Cities of To-Morrow (1902), that shaped the appearance of residential areas in the United States and Great Britain. Essentially a suburban form, Howard's garden city incorporated low-rise homes on winding streets and culs-de-sac, the separation of commerce from residences, and plentiful open space lush with greenery. Howard called for a “cooperative commonwealth” in which rises in property values would be shared by the community, open land would be communally held, and manufacturing and retail establishments would be clustered within a short distance of residences. Successors abandoned Howard's socialist ideals but held on to the residential design form established in the two new towns built during Howard's lifetime ( Letchworth and Welwyn Garden City), ultimately imitating the garden city model of winding roads and ample greenery in the forming of the modern suburban subdivision.Perhaps the single most influential factor in shaping the physical form of the contemporary city was transportation technology. The evolution of transport modes from foot and horse to mechanized vehicles facilitated tremendous urban territorial expansion. Workers were able to live far from their jobs, and goods could move quickly from point of production to market. However, automobiles and buses rapidly congested the streets in the older parts of cities. By threatening strangulation of traffic, they dramatized the need to establish new kinds of orderly circulation systems. Increasingly, transportation networks became the focus of planning activities, especially as subway systems were constructed in New York, London, and Paris at the beginning of the 20th century. To accommodate increased traffic, municipalities invested heavily in widening and extending roads. (See also traffic control.)Many city governments established planning departments during the first third of the 20th century. The year 1909 was a milestone in the establishment of urban planning as a modern governmental function: it saw the passage of Britain's first town-planning act and, in the United States, the first national conference on city planning, the publication of Burnham's (Burnham, Daniel H.) plan for Chicago, and the appointment of Chicago's (Chicago) Plan Commission (the first recognized planning agency in the United States, however, was created in Hartford, Connecticut, in 1907). Germany, Sweden, and other European countries also developed planning administration and law at this time.The colonial powers transported European concepts of city planning to the cities of the developing world. The result was often a new city planned according to Western principles of beauty and separation of uses, adjacent to unplanned settlements both new and old, subject to all the ills of the medieval European city. New Delhi, India, epitomizes this form of development. Built according to the scheme devised by the British planners Edwin Lutyens (Lutyens, Sir Edwin) and Herbert Baker, it grew up cheek by jowl with the tangled streets of Old Delhi. At the same time, the old city, while less salubrious, offered its inhabitants a sense of community, historical continuity, and a functionality more suited to their way of life. The same pattern repeated itself throughout the British-ruled (British Empire) territories, where African capitals such as Nairobi, Kenya, and Salisbury, Southern Rhodesia (now Harare, Zimbabwe), were similarly designed to accommodate their white colonial rulers. Although the decorative motifs imposed by France in its colonial capitals reflected a somewhat different aesthetic sensibility, French planners likewise implanted broad boulevards and European-style housing in their colonial outposts.Urban formzoning and subdivision controlsAs Western industrial cities rapidly expanded during the first part of the 20th century, factories encroached upon residential areas, tenements crowded in among small houses, and skyscrapers overshadowed other buildings. To preserve property values and achieve economy and efficiency in the structure and arrangement of the city, policy makers perceived a need to sort out incompatible activities, set some limits upon building size, and protect established areas from despoilment. Master plans prescribed the desired patterns of traffic circulation, bulk and density levels, and necessary public improvements. Zoning regulations, first instituted in the early decades of the 20th century, were the principal means for achieving these goals. They set maximums for building breadth and height and designated acceptable configurations of structures within demarcated areas (zones); most important in terms of their effect on urban development, zoning codes segregated particular uses of urban space. Thus, housing, manufacturing, and retail activities, which formerly intermixed, now took place in different parts of the city. Although zoning protected residents from adjacent noxious uses, it had the less-desirable further effect of forcing long trips to work and increasing routine travel, thereby contributing to traffic congestion and limiting activity in each part of the city to different times of the day. Some zoning codes provoked disputes. Court cases in the United States challenged zoning ordinances that, by requiring large single-residence dwellings on large lots, restricted the construction of affordable homes for low-income households. In some states courts struck down exclusionary zoning, and some remedial legislation was passed.Parallel to the evolution of zoning in the United States was the development of subdivision controls, which subjected the initial laying out of vacant land to public regulation. These regulations affected the design of new developments and specified that new streets had to conform to the overall city plan. Some subdivision ordinances required property developers to provide the land needed for streets, playgrounds, and school sites and to pay all or most of the cost of building these facilities.New towns (new town)After World War II a number of European countries, especially France, The Netherlands, Germany, and the Soviet Union, undertook the building of new towns (new town) (comprehensive new developments outside city centres) as governmental enterprises. Concerned with what they regarded as too much density within urban areas, governments constructed these new towns as a means of capturing the overspill from cities within planned developments rather than allowing haphazard exurban growth. Most of them, except in the Soviet Union, were primarily residential suburbs, although some British towns such as Milton Keynes did succeed in attracting both industry and population within low-rise conurbations. In Sweden the government successfully constructed accessible high-rise residential suburbs with mixed-income occupancy. Tapiola, in metropolitan Helsinki, Finland, was a low-rise ensemble embodying many of Howard's original ideas and incorporating architecture of the highest order. New town development in France, Italy, Spain, and Belgium, however, mostly resulted in large, uninviting high-rise residential projects for the working class on the urban periphery.American postwar new town development depended largely on private initiative, with Reston, Virginia; Columbia, Maryland; Irvine, California; and Seaside, Florida, serving as some of the better-known examples. Preceding these efforts, however, were a number of small, privately planned suburbs, including Riverside, Illinois, a planned community outside Chicago that was designed by Frederick Law Olmsted (Olmsted, Frederick Law) in 1868–69, and Radburn, New Jersey, built in 1929 according to plans conceived by Clarence Stein and Henry Wright. There are a few outstanding examples of planned new cities in such widely scattered places as India (where Le Corbusier designed Chandigarh), the Middle East, and South America.In Asia the emerging industrial economies of the post-World War II period produced large, densely populated, congested metropolises. Some Asian governments addressed the problems of rapid expansion through massive construction projects that encompassed skyscraper office buildings, shopping malls, luxury apartments and hotels, and new airports. In Shanghai, in the span of little more than a decade, the Chinese government created Pudong New Area—a planned central business district along with factories and residences in Pudong, across the Huangpu River from Shanghai's old downtown core. Many developing countries, however, are still preoccupied with political and economic problems and have made little progress toward establishing an environmental planning function capable of avoiding the insalubrious conditions that characterized Western cities in the 19th century.The scope of planningThroughout the first half of the 20th century, the influence of planning broadened within Europe as various national and local statutes increasingly guided new development. European governments became directly involved with housing provision for the working class, and decisions concerning the siting of housing construction shaped urban growth. In the United States, local planning in the form of zoning began with the 1916 New York City zoning law (New York City), but it was not until the Great Depression of the 1930s that the federal government intervened in matters of housing and land use. During World War II, military mobilization and the need to coordinate defense production caused the development of the most extensive planning frameworks ever seen in the United States and Britain. Although the wartime agencies were demobilized after hostilities ended, they set a precedent for national economic and demographic planning, which, however, was much more extensive in Britain than in the United States.Postwar approachesDuring the postwar period European governments mounted massive housing and rebuilding programs within their devastated cities. These programs were guided by the principles of modernist planning promulgated through the Congrès International d'Architecture Moderne (CIAM), based on the ideas of art and architectural historian Siegfried Giedion, Swiss architect Le Corbusier (Corbusier, Le), and the International school rooted in Germany's Bauhaus. High-rise structures separated by green spaces prevailed in the developments built during this period. Their form reflected both the need to produce large-scale, relatively inexpensive projects and the architects' preference for models that exploited new materials and technologies and could be replicated universally. Government involvement in housing development gave the public sector a more direct means of controlling the pattern of urban growth through its investments, rather than relying on regulatory devices as a means of restricting private developers.Within Britain the Greater London Plan of Leslie Patrick Abercrombie (Abercrombie, Sir Patrick) called for surrounding the metropolitan area with an inviolate greenbelt, construction of new towns beyond the greenbelt that would allow for lowering of population densities in the inner city, and the building of circumferential highways to divert traffic from the core. The concept of the sharp separation of city from country prevailed also throughout the rest of Britain and was widely adopted in the Scandinavian countries, Germany, and The Netherlands as well. In the United States the burgeoning demand for housing stimulated the construction of huge suburban subdivisions. Construction was privately planned and financed, but the federal government encouraged it through tax relief for homeowners and government-guaranteed mortgages. Suburban planning took place at the municipal level in the form of zoning and subdivision approval, public development of sewerage and water systems, and schools. The lack of metropolitan-wide planning jurisdictions resulted in largely unplanned growth and consequent urban sprawl. Within central cities, however, the federal government subsidized land clearance by local urban renewal authorities and the construction of public housing (i.e., publicly owned housing for low-income people). Local government restricted its own reconstruction activities to public facilities such as schools, police stations, and recreation centres. It relied on private investors for the bulk of new construction, simply indicating what would be desirable. Consequently, many cleared sites lay vacant for decades when the private market did not respond.Planning and governmentThe place of the city-planning function in the structure of urban government developed in different ways in different countries. In many countries today, private developers must obtain governmental permission in order to build. In the United States, however, they may build “as of right” if their plans conform to the municipality's zoning code. On the European continent, where municipal administration is strongly centralized, city planning occurs within the sphere of an executive department with substantial authority. In the United Kingdom the local planning authority is the elected local council, while a planning department acts in an executive and advisory capacity. Developers denied permission to build can appeal the verdict to the central government.Although the mayor and council have final decision-making power in U.S. cities, an independent planning commission of appointed members usually takes primary responsibility for routine planning functions. Planning activity primarily consists of the approval or disapproval of private development proposals. In larger cities the commission has a staff reporting to it. During the period of a large, federally financed urban renewal program in place from 1949 to 1974, most American cities had powerful semi-independent urban renewal authorities that were responsible for redevelopment planning. Some of these still exist, but in most places they either became subordinate to the mayor or combined with economic development agencies, which are often quasi-autonomous corporations. While they are appointed by the mayor and council, these agencies usually report to an independent board of directors drawn primarily from the business community. Especially as city government became preoccupied with economic development planning, the agencies were authorized to enter into development agreements with private investors (described below).In some countries, most notably in northern Europe, national governments made city planning part of their overall effort to deal with issues of growth and social welfare. Even in the United States—where the initiative remained with local governments and where metropolitan government never gained a significant foothold—the federal government became involved with local planning issues through the creation and execution of national housing and urban renewal legislation and through the supervisory role of the federal Department of Housing and Urban Development, established in 1965. As developing countries gained independence from colonial powers in the 1960s and '70s, planning structures became highly centralized within the new national governments, which typically laid down the framework for city planning.Competing modelsStarting in the 20th century, a number of urban planning theories came into prominence and, depending on their popularity and longevity, influenced the appearance and experience of the urban landscape. The primary goal of city planning in the mid-20th century was comprehensiveness. An increasing recognition of the interdependence of various aspects of the city led to the realization that land use, transport, and housing needed to be designed in relation to each other. Developments in other disciplines, particularly management science and operations research, influenced academic planners who sought to elaborate a universal method—also known as “the rational model”—whereby experts would evaluate alternatives in relation to a specified set of goals and then choose the optimum solution. The rational model was briefly hegemonic, but this scientific approach to public-policy making was quickly challenged by critics who argued that the human consequences of planning decisions could not be neatly quantified and added up.The modernist model, involving wholesale demolition and reconstruction under the direction of planning officials isolated from public opinion, came under fierce attack both intellectually and on the ground. Most important in undermining support for the modernist approach was urbanologist Jane Jacobs (Jacobs, Jane). In her book The Death and Life of Great American Cities (1961), she sarcastically described redeveloped downtowns and housing projects as comprising the “radiant garden city”—a sly reference to the influence of Le Corbusier's “towers in the park” (from his cité radieuse concept) and Ebenezer Howard's antiurban garden city. Jacobs criticized large-scale clearance operations for destroying the complex social fabric of cities and imposing an inhuman orderliness. Rather than seeing high population density as an evil, she regarded it as an important factor in urban vitality. She considered that a lively street life made cities attractive, and she promoted diversity of uses and population groups as a principal value in governing urban development. According to Jacobs, urban diversity contributes to sustainable growth, whereas undifferentiated urban settings tend to depend upon unsustainable exploitation, exhibited in the extreme form by lumber or mining towns that collapse after the valuable resources have been removed. Jacobs was not alone in her criticism. Beginning in the 1960s, urban social movements, at times amounting to insurrection, opposed the displacements caused by large-scale modernist planning. In cities throughout the United States and Europe, efforts at demolishing occupied housing provoked fierce opposition. Within developing countries, governmental attempts to destroy squatter settlements stimulated similar counteroffensives.By the end of the 20th century, planning orthodoxy in the United States and Europe began to take Jacobs's arguments into account. New emphasis was placed on the rehabilitation of existing buildings, historical preservation, adaptive reuse of obsolete structures, mixed-use development, and the “24-hour city”—i.e., districts where a variety of functions would create around-the-clock activity. Major new projects, while still sometimes involving demolition of occupied housing or commercial structures, increasingly came to be built on vacant or “brownfields” sites such as disused railroad yards, outmoded port facilities, and abandoned factory districts. Within developing countries, however, the modernist concepts of the earlier period still retained a significant hold. Thus, for example, China, in preparation for the Beijing Olympics of 2008, engaged in major displacement of its urban population to construct roads and sports facilities, and it likewise developed new commercial districts by building high-rise structures along the functionalist Corbusian model.Contemporary planningThe ways in which planning operated at the beginning of the 21st century did not conform to a single model of either a replicable process or a desirable outcome. Within Europe and the United States, calls for a participatory mode—one that involved residents most likely to be affected by change in the planning process for their locales—came to be honoured in some cities but not in others. The concept of participatory planning has spread to the rest of the world, although it remains limited in its adoption. Generally, the extent to which planning involves public participation reflects the degree of democracy enjoyed in each location. Where government is authoritarian, so is planning. Within a more participatory framework, the role of planner changes from that of expert to that of mediator between different groups, or “stakeholders.” This changed role has been endorsed by theorists supporting a concept of “communicative rationality.” Critics of this viewpoint, however, argue that the process may suppress innovation or simply promote the wishes of those who have the most power, resulting in outcomes contrary to the public interest. They are also concerned that the response of “not in my backyard” (“NIMBYism”) precludes building affordable housing and needed public facilities if neighborhood residents are able to veto any construction that they fear will lower their property values.In sum, the enormous variety of types of projects on which planners work, the lack of consensus over processes and goals, and the varying approaches taken in different cities and countries have produced great variation within contemporary urban planning. Nevertheless, although the original principle of strict segregation of uses continues to prevail in many places, there is an observable trend toward mixed-use development—particularly of complementary activities such as retail, entertainment, and housing—within urban centres.Changing objectivesAlthough certain goals of planning, such as protection of the environment, remain important, emphases among the various objectives have changed. In particular, economic development planning, especially in old cities that have suffered from the decline of manufacturing, has come to the fore. Planners responsible for economic development behave much like business executives engaged in marketing: they promote their cities to potential investors and evaluate physical development in terms of its attractiveness to capital and its potential to create jobs, rather than by its healthfulness or conformity to a master plan. Such planners work to achieve development agreements with builders and firms that will contribute to local commerce. Especially in the United States and the United Kingdom, planning agencies have concerned themselves with promoting economic development and have become involved in negotiating deals with private developers. In the United Kingdom these can include the trading of planning permission for “planning gain” or other community benefits; in other words, developers may be allowed to build in return for providing funds, facilities, or other benefits to the community. In the United States, where special permission is not required if the building fits into the zoning ordinance, deals usually involve some kind of public subsidy. Typical development agreements involve offering land, tax forgiveness, or regulatory relief to property developers in return for a commitment to invest in an area or to provide amenities. An agreement may also be struck between the city and a private firm in which the firm agrees to move into or remain in an area in return for various concessions. Many such arrangements generate controversy, especially if a municipality exercises the right of eminent domain and takes privately owned land for development projects.A late 20th-century movement in planning, variously called new urbanism, smart growth, or neotraditionalism, has attracted popular attention through its alternative views of suburban development. Reflecting considerable revulsion against urban sprawl, suburban traffic congestion, and long commuting times, this movement has endorsed new construction that brings home, work, and shopping into proximity, encourages pedestrian traffic, promotes development around mass-transit nodes, and mixes types of housing. Within the United Kingdom, Prince Charles became a strong proponent of neotraditional planning through his sponsorship of Poundbury, a new town of traditional appearance in Dorset. Similar efforts in the United States, where growth on the metropolitan periphery continued unabated, chiefly arose as limited areas of planned development amid ongoing dispersal and sprawl. Although the movement's primary influence has been in new suburban development, it has also been applied to the redevelopment of older areas within the United Kingdom and the United States. Paternoster Square in London, adjacent to Saint Paul's Cathedral, and a number of HOPE VI schemes in the United States (built under a federal program that demolished public housing projects and replaced them with mixed-income developments) have been erected in accordance with neotraditional or new urbanist ideas.New pluralismUniversal principles regarding appropriate planning have increasingly broken down as a consequence of several trends. First, intellectual arguments against a “one plan fits all” approach have gained ascendancy. The original consensus on the form of orderly development embodying separation of uses and standardized construction along modernist lines has been replaced by sensitivity to local differences and greater willingness to accept democratic input. Second, it has become widely recognized that, even where the imposition of standards might be desirable, many places lack the resources to attain them. Within the developing world, informal markets and settlements, formerly condemned by planners, now appear to be inevitable and often appropriate in serving the needs of poor communities. Planners in these contexts, influenced by international aid institutions, increasingly endeavour to upgrade squatter settlements and street markets rather than eliminate them in the name of progress. Third, political forces espousing the free market have forced planners to seek market-based solutions to problems such as pollution and the provision of public services. This has led to privatization of formerly publicly owned facilities and utilities and to the trading of rights to develop land and to emit pollutants in place of a purely regulatory approach. (See also environmental engineering; environmental law.)Planning in its origins had an implicit premise that a well-designed, comprehensively planned city would be a socially ameliorative one. In other words, it tended toward environmental determinism. The goals of planning have subsequently become more modest, and the belief that the physical environment can profoundly affect social behaviour has diminished. Nevertheless, planning as practice and discipline relies upon public policy as an instrument for producing a more equitable and attractive environment that, while not radically altering human behaviour, nonetheless contributes to improvements in the quality of life for a great number of people.Susan S. FainsteinAdditional ReadingHistorical background on urban planning is discussed in Michael Harloe, The People's Home?: Social Rented Housing in Europe and America (1995), a history of social housing; Erwin A. Gutkind, International History of City Development, ed. by Gabriele Gutkind, 7 vol. (1964–72), a more global treatment; and Peter Hall, Cities of Tomorrow, 3rd ed. (2002), a history of city planning in the 20th century. Works representing views from the mid-20th century include William I. Goodman and Eric C. Freund (eds.), Principles and Practice of Urban Planning, 4th ed. (1968); Michael P. Brooks, Social Planning and City Planning (1970); Kevin Lynch and Gary Hack, Site Planning, 3rd ed. (1984), the classic text on this topic; and Charles Abrams, Man's Struggle for Shelter in an Urbanizing World (1964, reissued 1966).Theories and alternative practices are presented in Robert Fishman, Urban Utopias in the Twentieth Century (1977, reissued 1982), a summary of the lives and proposals of Ebenezer Howard, Frank Lloyd Wright, and Le Corbusier, and Bourgeois Utopias (1987), a social history of the development of suburbia; Jane Jacobs, The Death and Life of Great American Cities (1961, reissued 2002), the classic critique of urban renewal programs; Scott Campbell and Susan S. Fainstein (eds.), Readings in Planning Theory, 2nd ed. (2003), highlighting previously published texts representative of contemporary planning theory and its controversies; Robert Freestone (ed.), Urban Planning in a Changing World (2000), essays examining the situation of planning at the start of the 21st century; Patsy Healey, Collaborative Planning: Shaping Places in Fragmented Societies (2005), an argument for planning as a communicative process; and World Commission on Environment and Development, Our Common Future (1987), advancing the concept of sustainable development.
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