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Although a number of environmental and policy interventions to pro- mote physical activity are being widely used, there is sparse systematic information on the most effective approaches to guide population-wide interventions. Methods: We reviewed studies that addressed the following environmental and policy strat- egies to promote physical activity: community-scale urban design and land use policies and practices to increase physical activity; street-scale urban design and land use policies to increase physical activity; and transportation and travel policies and practices. These systematic reviews were based on the methods of the inde- pendent Task Force on Community Preventive Services. Exposure variables were classified according to the types of infrastructures/policies present in each study. Measures of physical activity behavior were used to assess effectiveness. Results: Two interventions were effective in promoting physical activity (community-scale and street-scale urban design and land use policies and practices). Additional information about applicability, other effects, and barriers to implementation are provided for these interventions. Evidence is insufficient to assess transportation policy and practices to promote physical activity. Conclusions: Because com- munity- and street-scale urban design and land-use policies and practices met the Community Guide criteria for being effective physical activity interventions, implementing these policies and practices at the community-level should be a priority of public health practitioners and community decision makers.

The research examines the shift from flood-resistant policies and plans to flood resilience. We use a case study of New Orleans since Hurricane Katrina to illustrate this unfolding process and the emergence of a "living with water" approach to green infrastructure. The article highlights the challenges of this shifting policy landscape through the case of the Lafitte Greenway, a green infrastructure project that transformed a three-mile corridor of underutilized public land into a linear park running through flood-prone neighborhoods. Through the experience of creating this greenway, planners in New Orleans learned valuable lessons about US disaster rebuilding policies and how to implement green infrastructure in urban neighborhoods.

This article addresses the tradeoff between the values households’ place on shared open space and parcel size, and the implications for housing development policy. Marginal implicit prices of shared open space and single-family housing parcel size are estimated using geographically weighted regression corrected for spatial autocorrela- tion. The marginal rate of substitution (MRS) of shared open space for lot size is calculated for individual households. Defining target areas based on site-specific MRSs could provide policy makers with more accurate information for designing or updating location-specific land use policies in efforts to moderate urban sprawl.

As urbanization progresses, open space becomes structured as units of progressively smaller sizes and with more pronounced physical and functional boundaries. This paper analyzes these Open Space Units (OSUs) in Flanders, and seeks how size of open space units, hence also spatial fragmentation, affects the evaluation of these units. The results clearly confirm a ‘fragmentation bias’, meaning a lower valuation of smaller units, which leads to a strategic gap and land use uncertainty concerning large stretches of area with high degree of fragmentation. This valuation is confronted with the contrasting and positive values expressed in a strategic open space project by local stakeholders about a typical peri-urban remnant open space unit. Overcoming the ‘fragmentation bias’ in open space valuation is a continuing challenge in planning and open space policies, especially in highly urbanized environments.

We examine 5,603 property transactions in Jefferson County, Alabama that take place between 2004 and 2008. Using OLS regressions, we estimate the extent to which differences in walkability, as measured by Walk Score, can explain the variability in land values. We find that after controlling for population growth and lot size, land values generally increase with walkability and that this result is stable over time. However, we find evidence that this impact reverses as neighborhoods become more car-dependent. This car dependency increases as the distance from the central business district increases. We consider the implications of our findings on mixed-use developments in what we believe is the first study to address walkability in this context of sustainable development.

This article examines the aestheticization of the politics of exclusion in a suburban American community. The research for this study focuses on the relationships among landscapes, social identity, exclusion, and the aesthetic attitudes of residents of Bedford, New York. By being thoroughly aestheticized, class relations are mystified and reduced to questions of lifestyle, consumption patterns, taste, and visual pleasure. Landscapes become possessions that play an active role in the performance of elite social identities. As such, social distinction is achieved and maintained by preserving and enhancing the beauty of places such as Bedford. This aestheticizing of place is managed through highly restrictive zoning policies for residential land and by "protecting" hundreds of acres of undeveloped land as nature preserves. This article explores the role of romantic ideology, localism, antiurbanism, antimodemism, and a class-based aesthetic in the construction of "wild" nature in these preserves. We argue that, in places such as Bedford, the celebration of localism, environmental beauty, and preservation mask the interrelatedness of issues of aesthetics and class identity on the one hand and residential land shortages in the New York metropolitan region on the other. The seemingly innocent pleasure in the aesthetic appreciation of landscapes and the desire to protect nature can act as a subtle but highly effective mechanism of social exclusion and the reaffirmation of elite class identities.

Increasingly, scholars suggest thinking of the street as a social space, rather than just a channel for movement. Studies that address the relationships between social behavior and environmental quality of the street tend to separate the study of physical features from land uses and hence do not address the interrelationships between behavioral patterns and physical features of the street and its sociability. This article is an empirical examination of behavioral responses of people to the environmental quality of neighborhood commercial streets. Structured and semistructured observations are used to study stationary, lingering, and social activities on three neighborhood commercial streets. Eleven land use and physical characteristics of buildings and the street are identified based on the literature review and extensive observations. These are measured and tested to understand which characteristics support stationary, lingering, and social activities. The findings reveal that people are equally concerned with the social, land use, and physical aspects of the street. Seating provided by businesses, seating provided by the public authorities, businesses that are community places, personalized street fronts, and sidewalk width particularly contribute to stationary and social activities on neighborhood commercial streets.

Throughout recent decades, socially-mixed neighborhoods have become a key element of urban policy and debate. This paper argues, with Amsterdam as an empirical case, that the design, layout and everyday use of social space—including public and private space—is of key importance in understanding the experiences and perspectives of social- mix policies amongst ‘urban practitioners’, such as planners, architects and management personnel. While the promotion of ‘liveability’, through the management of social problems, is often highlighted as a key element of social-mix policies, the findings presented indicate the degree to which the mixing of different groups according to ethnicity, race and social class presents a number of new challenges for liveability and management within both public and private space. Furthermore, it is argued that these challenges play a significant role in dictating the scale at which social mixing takes place, from the urban block to the street and at the neighbourhood level. It is concluded that a greater amount of attention is needed to such factors in understanding the dynamics of social interaction in public and private communal space when seeking to understand the everyday realities of socially- mixed neighborhoods.

Although many low-income urban areas are highly walkable by conventional measures such as population density or land use mix, chronic diseases related to lack of physical activity are more common among residents of these areas. Disparities in neighborhood conditions may make poor areas less attractive environments for walking, offsetting the advantages of density and land use mix. This study compared poor and nonpoor neighborhoods in New York City, using geographic information systems measures constructed from public data for US census tracts within New York City (N = 2,172) as well as field observation of a matched-pair sample of 76 block faces on commercial streets in poor and nonpoor neighborhoods. Poor census tracts had significantly fewer street trees, landmarked buildings, clean streets, and sidewalk cafes, and higher rates of felony complaints, narcotics arrests, and vehicular crashes. The field observation showed similar results. Improving aesthetic and safety conditions in poor neighborhoods may help reduce disparities in physical activity among urban residents.

Public spaces constitute one of the first urban elements to be threatened in times of instability. Their efficient supply and management becomes a concern for both public authorities and individual users. This paper examines the role and objectives of social entrepreneurs in supplying temporary public spaces within an unstable setting and focuses on small group collective action. The mechanisms used to identify potential land, negotiate use-rights and promote these spaces are discussed for the case of Beirut, Lebanon, a society segregated by the effects of war and political upheaval. The case of an organic food market is used to illustrate temporary public spaces in the critical period of 2005–2007, when political instability reigned in the country and rendered conventional public spaces undesirable. The paper concludes by drawing lessons for land readjustment in crisis situations from the movement of temporary public spaces within a city while still attracting people that formerly had difficulties meeting elsewhere.

This paper examines the relationship between ethnic residential segregation and two components of the built environment: the geographic distribution of its elements and their spatial configuration (i.e., the spatial relations and visual access between those elements). This relationship is investigated through a case study of Arab-Jewish residential segregation in Jaffa. Statistical and structural analyses (Q-analysis) of this case show that the conjunction of elements having different meanings (symbolic, cultural, functional, etc.) with spatial and visual integration attributes provides varying conditions for the expansion of the Arab Jewish residential patterns, a process potentially affecting the geographic scale intensity of residential segregation. It was found, for example, that public land uses having relatively 'neutral' ethnic and symbolic meanings (e.g. commercial sites and parks) and spatially integrated with the surrounding urban environment tend to moderate residential segregation. Identification of the institutional character of the built environment—segregation/encounters in mixed ethnic areas—may contribute to a more socially oriented spatial policy.

This two-part essay analyses the changing nature of the public realm in the evolving edge of the American metropolis and the implications for urban design and planning. Many forces are changing the form and use of public space in cities--concerns for safety and liveability, increasing dependence on telecommunications, decline in public revenues, the privatization of many amenities, and an increasingly pluralist society. The essay specifically focuses on the historical influence of planning and design practices on suburban form: density levels, land use and zoning patterns, suburban layouts and streetscapes. Field surveys and morphological analyses of urban edge patterns from the San Francisco Bay area document the current state of the suburban public realm. The second part of the essay will examine how physical planning can contribute to restoring a more vibrant public realm amidst raging debates over its changing nature and relevance.

Public policies supporting market-oriented strategies to develop mixed-income communities have become ascendant in the United States and a number of other countries around the world. Although framed as addressing both market goals of revitalization and social goals of poverty deconcentration and inclusion, these efforts at 'positive gentrification' also generate a set of fundamental tensions - between integration and exclusion, use value and exchange value, appropriation and control, poverty and development - that play out in particular concrete ways on the ground. Drawing on social control theory and the 'right to the city' framework of Henri Lefebvre, this article interrogates these tensions as they become manifest in three mixed-income communities being developed to replace public housing complexes in Chicago, focusing particularly on responses to competing expectations regarding the use of space and appropriate normative behavior, and to the negotiation of these expectations in the context of arguments about safety, order, what constitutes 'public' space, and the nature and extent of rights to use that space in daily life.

Urban scholars lament the loss of public space due to heightened security and behavioral controls borne of economic priorities and anti‐terror concerns after September 11th 2001. Owners and managers of government buildings, banks and courthouses have closed streets and fitted the surrounding space with concrete barriers, bollards and moat‐like structures to prevent potential terror attacks. These are reasonable protections in emergency situations, but, as threat levels fall, these zones fail to incorporate a diversity of users, privatizing the space for those with security clearance. The ubiquity of these zones encourages us to consider them as a new type of land use. To test this statement, we describe the results of site visits to two high‐profile New York City neighborhoods (one with numerous civic buildings, the other populated with corporate headquarters). Using a simple tool we developed, we find that 27% of aggregate non‐building area in the two districts is now in a security zone. Interestingly, the percentage of space within each district that can be classed as a security zone is reasonably similar, providing insight into the way in which terror targets are internally and externally defined and justified. We argue that this new type of land use is an important and permanent feature of twenty‐first century global cities.

The disappearance of public spaces from the urban realm is a sign of the de-individuation and asocialization of the modern individual. However, cities still provide important tools for reclaiming our lost public life. The aim of this essay is to approach industrial heritage, usually considered a conservation issue, from a different perspective, as a tool for individuation and socialization. In order to do this, we start by describing the effects of capitalism and globalization on public open spaces, and then link this to governments’ privatization policies for industrial heritage. We show how industrial landscapes could function as public spaces. Finally, we explain how, in the absence of other public open spaces, industrial landscapes could be used for public purposes to meet the social needs of humans, and could thus be instrumental in the proliferation of our rituals.

This research, derived from a pragmatic approach, concentrates on the problem of segregated urban space and the disconnection between buildings and the street. In Turkey, development plans and policies often neglect the organization of space between indoor and outdoor areas. However, previous research has shown that the organization of space between buildings has an important impact on social interaction. Although modern housing estates, with their lack of inbetween spaces (i.e., spaces that are neither completely private nor public) compared with traditional and mixed-use neighborhoods, support introverted lifestyles, the results of this empirical analysis refuted the hypothesis that modern housing estates would exhibit a reduced sense of community. The outcomes of this study support the arguments developed by urban sociologists and environmental psychologists who claim that physical space may provide for social interactions but not necessarily for a sense of community.

Around the world, there is increasing concern with the ways in which different populations use public spaces and places. Focusing on the French context, this paper investigates conceptual difficulties inherent in the co‐occupation of space by different population groups. The focus is to shed light on the ordinary engagement of teenagers in a working‐class neighbourhood in terms of differentiated social practices according to gender, age, social network, the physical and social morphology of the neighbourhood, and relational and situational criteria. Their occupation of space is channelled by public policies as well as educational, family, and socio‐educational care that structure their time and space. However, this paper highlights also the subjective dimension. Manipulating the ‘regime of familiarity’ and the ‘regime of regular planning’, teenagers learn through experimentation to use the ‘regime of justification’, thus challenging adult spatiality in terms of their moral and political involvement. The deliberate and involuntary characteristics of their occupation of space transgresses the accepted uses of public space and disturbs adults. Their actions produce discomfort, which adult residents express through distancing practices. Teenagers recall various situations of general dissatisfaction that they are unable to synthesise in a complaint with reference to a general problem, and they express this feeling through stronger transgressions. Low‐level conflict between adults and teenagers is thus self‐perpetuated. Furthermore, teenagers' occupation of space is differentiated between girls and boys, between the ‘cool’ teenagers and the ‘geeks’, the teenagers from the neighbourhood and those from the outside, those who ‘have origins’ and those who do not. This generates unpleasant reciprocal disturbance and an everyday conflict that is further perpetuated by the failure to frame this disturbance as a public problem.

Urban designers are interested in the environmental qualities of places that make them better for walking, not only as settings for physical activity, but also as sensorial and social settings. Research in walkability lacks qualitative studies that address the microscale analyses of the environment. This paper is an empirical examination of the relationship of the physical, land-use, and social characteristics of the environment at the microscale to people’s behavior and perceptions toward walking. Using the data from surveys and interviews, this research emphasizes the integration of user perceptions and subjective measures to understand the impact of environmental characteristics on walking behavior on Main Streets. Adding to previous research, this study demonstrates the significance of social qualities in supporting walking. The findings expand our understanding of the hierarchy and criteria of walking needs and suggest that, given a safe and comfortable setting, people look for usefulness, sense of belonging and pleasurability as additional and distinct needs to enhance their walking experience.

Research has identified several factors that affect fear of crime in public space. However, the extent to which gender moderates the effectiveness of fear-reducing measures has received little attention. Using data from the Chicago Transit Authority Customer Satisfaction Survey of 2003, this study aims to understand whether train transit security practices and service attributes affect men and women differently. Findings indicate that, while the presence of video cameras has a lower effect on women's feelings of safety compared with men, frequent and on-time service matters more to male passengers. Additionally, experience with safety-related problems affects women significantly more than men. Conclusions discuss the implications of the study for theory and gender-specific policies to improve perceptions of transit safety.

Jane Jacobs's The Death and Life of Great American Cities (1961) had an enormous influence on urban design theories and practices. This study aims to operationalize Jacobs's conditions for a vital urban life. These are (1) mixed use, (2) small blocks, (3) aged buildings, and (4) a sufficient concentration of buildings. Jacobs suggested that a vital urban life could be sustained by an urban realm that promotes pedestrian activity for various purposes at various times. Employing multilevel binomial models, we empirically verified that Jacobs's conditions for urban diversity play a significant role with regard to pedestrian activity.