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Since the advocacy planners of the 1960s first brought widespread public participation to the planning process, there have been innovations and improvements. However, the participation practices in the real world, with its face-to-face politics of difference and unequal power relations, are flawed. Today, technology allows for an entirely new generation of forms and practices of public participation that promise to elevate the public discourse in an unprecedented manner while providing an interactive, networked environment for decision-making. This is occurring with asynchronous communities interacting with one another on a variety of planning subjects, which allows for more democratic planning and more meaningful participation. In this paper, we review the ways in which today's web-based virtual worlds, like Facebook and Second Life, provide platforms for public participation in planning in a manner distinct from previous formats. We explore the different ways that citizens and communities are using web-based technologies for citizen participation, including the use of Facebook for community organizing around planning issues and of Second Life for virtual workshops. We include case studies of communities that are using these tools. The paper concludes by exploring the contribution that virtual participation can make to planning and examines the challenges that it poses.

Urban policymakers and planners tend to view population decline as a bad thing and a vast infrastructure of funding and regulation reinforces this idea. An emerging body of research has challenged this mindset by reframing decline as shrinkage and experimenting with new policy tools under the rubric of smart decline. But the question of whether decline impairs quality of life in cities is a conceptually murky one. This paper operationalizes quality of life by examining survey data for 38 U.S. cities on perceptions of neighborhood quality. The results show a high level of heterogeneity among shrinking cities in terms of perceptions of neighborhood quality, with some cities experiencing both loss in housing and population while increasing overall perceptions of neighborhood quality. Future research ought to probe these relationships further to better understand how smart decline might affect neighborhood change.

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Public participation is an important part of the urban planning process. However, too often the goals of this participation are not clearly articulated and, as a result, the platforms for participation created with digital technologies are often poorly designed or simply lack clarity. Immersive planning is a conceptual model with which to conceive the process of public participation that focuses on the depth and breadth of user experience. Borrowing from literature on games and virtual environments, we frame recent, technologically aided approaches to public participation within three categories of immersion: challenge-based, sensory, and imaginative. Geographic information systems, computer aided design, planning support systems, virtual environments, and digital games are all methods of obtaining user immersion in one or a combination of these categories. In this paper we provide a review of the foundational literature and influential projects in this area, and by framing them within the model of immersive planning seek to connect these efforts to provide a clearer path forward in employing new technologies for public participation.

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The manuscript did undergo copyediting, typesetting, and review of the resulting proof before it was published in its final form.

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. Copyright (c) 2009 The Authors. Journal Compilation (c) 2009 Joint Editors and Blackwell Publishing Ltd.