Royce Hanson

Wrestling Sprawl to the Ground: Defining and measuring an elusive concept

Abstract The literature on urban sprawl confuses causes, consequences, and conditions. This article presents a conceptual definition of sprawl based on eight distinct dimensions of land use patterns: density, continuity, concentration, clustering, centrality, nuclearity mixed uses, and proximity. Sprawl is defined as a condition of land use that is represented by low values on one or more of these dimensions. Each dimension is operationally defined and tested in 13 urbanized areas. Results for six dimensions are reported for each area, and an initial comparison of the extent of sprawl in the 13 areas is provided. The test confirms the utility of the approach and suggests that a clearer conceptual and operational definition can facilitate research on the causes and consequences of sprawl.

The Fundamental Challenge in Measuring Sprawl: Which Land Should Be Considered?

Abstract Lack of agreement on how to define and measure sprawl has hampered development of policy related to its causes and consequences. We question previous work for two reasons: the use of study areas that overbound or underbound sprawl landscapes, and the failure to account for land unavailable for development. We formulate “extended urban areas,” based on housing density and commuting patterns and argue that they represent a preferable geographic basis for measuring sprawl. We operationalize with satellite imagery a way for measuring land unavailable for development in these areas. We then compute five measures of urban development using the National Land Cover Data Base and decennial census data to assess the extent of sprawl in the extended urban areas of Atlanta, Baltimore, Boston, Los Angeles, and Washington. Our sensitivity analyses reveal that the measurement of sprawl critically depends on which land area forms the basis of the analysis, and, to a lesser degree, how one accounts for land unavailable for development. *This research was funded in part by the U.S. Geological Survey (USGS) under Cooperative Agreement No. 01CRAG0009, whose support is gratefully acknowledged. The opinions expressed in this report are the authors and do not necessarily reflect the views of the USGS or the organizations for whom they work. The authors gratefully acknowledge the efforts of Doug Towns and Jackie Cutsinger of Wayne States Center for Urban Studies for their GIS and programming assistance. Anonymous referees provided helpful suggestions on an earlier draft.

Verifying the Multi‐Dimensional Nature of Metropolitan Land Use: Advancing the Understanding and Measurement of Sprawl

ABSTRACT: Twelve conceptually distinct dimensions of land use patterns are operationalized for 50 large US metropolitan areas using a battery of indices. Common patterns of variation in these indices across metropolitan areas are discerned using correlation and factor analyses. We find that: (1) seven principal components best summarize the dimensions of housing and employment land uses, (2) metro areas often exhibit both high and low levels of sprawl-like patterns across the seven components, and (3) housing and employment aspects of sprawl-like patterns differ in nature. Thus, land use patterns prove multi-dimensional in both theory and practice. Exploratory analyses indicate: (1) little regional variation in land use patterns, (2) metro areas with larger populations are more dense/continuous with greater housing centrality and concentration of employment in the core, (3) older areas have higher degrees of housing concentration and employment in the core, (4) constrained areas evince greater density/continuity, and (5) inter-metropolitan variations in several dimensions of land use patterns are not well explained by population, age, growth patterns, or topographical constraints on development. Results imply that policymakers must carefully unravel which land use dimension is causing undesirable outcomes, and then devise precise policy instruments to change only this dimension.

Testing the Conventional Wisdom about Land Use and Traffic Congestion: The More We Sprawl, the Less We Move?

The paper explores relationships between seven dimensions of land use in 1990 and subsequent levels of three traffic congestion outcomes in 2000 for a sample of 50 large US urban areas. Multiple regression models are developed to address several methodological concerns, including reverse causation and time-lags. Controlling for prior levels of congestion and changes in an urban areas transport network and relevant demographics, it is found that: density/ continuity is positively related to subsequent roadway ADT/lane and delay per capita; housing centrality is positively related to subsequent delay per capita; and housing-job proximity is inversely related to subsequent commute time. Only the last result corresponds to the conventional wisdom that more compact metropolitan land use patterns reduce traffic congestion. These results prove two points: that the choice of congestion measure may substantively affect the results; and that multivariate statistical analyses are necessary to control for potentially confounding influences, such as population growth and investment in the transport network.

CORPORATE CITIZENSHIP AND URBAN PROBLEM SOLVING: THE CHANGING CIVIC ROLE OF BUSINESS LEADERS IN AMERICAN CITIES

ABSTRACT: Our concern in this article is corporate civic elite organizations and their role in social production and urban policy in the United States. Recent urban literature has suggested that the power and influence of CEO organizations has declined and that there has been some disengagement of corporate elites from civic efforts in many urban areas. Yet while these trends and their likely consequences are generally acknowledged, relatively little empirical research has been conducted on the nature and extent of the shifts in corporate civic leadership and on how these shifts have affected the civic agendas of central cities and metropolitan regions. In this study we obtain data from 19 large metropolitan areas in order to more systematically examine shifts in corporate civic leadership and their consequences. Our results suggest that the institutional autonomy, time, and personal connections to the central cities of many CEOs have diminished and that the civic organizations though which CEOs work appear to have experienced lowered capacity for sustained action. These trends suggest that while many CEOs and their firms will continue to commit their time and their firms’ slack resources to civic enterprises, the problems they address will differ from those tackled in the past. We discuss the important implications these shifts have for the future of corporate civic engagement in urban problem solving and for the practice of urban governance.

Active Living and Biking: Tracing the Evolution of a Biking System in Arlington, Virginia

In Arlington, Virginia, a steady evolutionary change in biking policy during the last three decades has yielded some of the nations best biking assets. It has a comprehensive, well-connected, highly integrated, well-mapped, and well-signed system of shared-use paved trails, bike lanes, bike routes, and other biking assets, such as workplace showers. Understanding the conditions that led to Arlingtons current biking system can provide lessons in the strategy and tactics of active-living politics. One potentially effective political strategy that was successful in Arlington is for activists to pressure elected officials to select professional managers who see bike-ways as crucial to the overall transportation system. Then it is important to formalize the government-citizen relationship through an advisory panel. Also, in Arlington, the incremental creation of biking assets helped create demand for more and better facilities. In turn, this created political support for expanding and upgrading. Finally, Arlington used potentially negative circumstances (e.g., the building of highway corridors, the introduction of the Metro) as opportunities to change the built environment in ways that have encouraged more active living.

Institutional Renewal in American Cities

Urban institutions change slowly. Reform responds to crisis. Few cities are institutionally equipped to anticipate change or provide leadership for transition to a new economy. Command and control centers enjoy greater evidence of institutional renewal than subordinate centers. The principal conditions that advance institutional renewal in a city are economic and political autonomy, the presence of catalysts for change, intermediary organizations, and a civic culture that nurtures leadership and change. Any strategy for institutional renewal must recognize the importance of time, the need for an intelligence capacity that can understand urban systems and has the ability to reframe issues, and the value of importing as well as promoting homegrown leaders. The most difficult institutions to renew are those involving the political system. Parties and interest groups are ill-equipped to renew themselves or provide effective leadership in most cities. Broad institutional renewal requires entrepreneurs rather than caretakers. A strong independent sector is a key factor in institutional renewal strategy. Ultimately, institutional renewal concerns the revival of local self-government and the ability of cities to shape their own futures.