This synthesis will be of interest to highway environmental specialists (particularly those concerned with assessing social and economic impacts), design engineers, planners, utility managers, and others responsible for the planning, design, and implementation of highway-widening improvements. Information is presented on the reasons for highway-widening projects, the nature of the projects, and the methods and practices for application of analytical techniques used to measure the potential or actual impacts of the projects on people and the physical environment. Mitigation measures are also discussed. This report of the Transportation Research Board describes the most recent widening projects as reported by states or other transportation agencies, as well as the most frequently encountered issues in highway widening. Selected examples of widening projects are included, as is some recognition of the need for additional information and research in the areas of social and economic impact measurement.

All phases of road developmentâ€"from construction and use by vehicles to maintenanceâ€"affect physical and chemical soil conditions, water flow, and air and water quality, as well as plants and animals. Roads and traffic can alter wildlife habitat, cause vehicle-related mortality, impede animal migration, and disperse nonnative pest species of plants and animals. Integrating environmental considerations into all phases of transportation is an important, evolving process. The increasing awareness of environmental issues has made road development more complex and controversial. Over the past two decades, the Federal Highway Administration and state transportation agencies have increasingly recognized the importance of the effects of transportation on the natural environment. This report provides guidance on ways to reconcile the different goals of road development and environmental conservation. It identifies the ecological effects of roads that can be evaluated in the planning, design, construction, and maintenance of roads and offers several recommendations to help better understand and manage ecological impacts of paved roads.

Urban sprawl has gained much national attention in recent years. Sprawl involves not only land-use issues but also legal, political, and social concerns. It affects our schools, the environment, and race relations. Comprehensive enough for high school students and also appropriate for college undergraduates, Remaking American Communities delves into the challenges of urban sprawl by turning to some of America's top thinkers on the problem, including Robert Yaro, president of the Regional Plan Association. Other cutting-edge essays include a foreword about the emergence of sprawl by nationally syndicated columnist Neal Peirce, views about race and class by former mayor of Albuquerque David Rusk, and a discussion of transportation dynamics by Curtis Johnson, president of the Citistates Group. ø The essays in this collection explore the core issues of sprawl and the agenda for dealing with it. Complete with a glossary, resources, and contact information for smart-growth alliances, this book is extremely user-friendly. David C. Soule offers an unbiased viewpoint of this national phenomenon in a way that will be accessible to students and those with little background in the issue.

America's inner cities, particularly those in older industrial metropolitan areas, have declined sharply in both population and employment over the past two decades. How much of this change is due to technological advances in transportation, communication, and manufacturing? How much of it is due to the changing racial composition of the central cities? Can any set of public policies retard or reverse the decline of the industrial cities? This book presents an interdisciplinary collection of papers addressing these questions. In the introduction, editor Paul E. Peterson discusses the ways in which adverse economic and racial changes interact and urges more realistic federal policies to counteract these changes. In Part 1, "The Processes of Urban Growth and Decline," sociologist John D. Kasarda analyzes the growing mismatch between inner-city jobs and residents, and geographer Brian J. L. Berry discusses the economics of inner-city gentrification. Racial change is the subject of Part II: sociologist Elijah Anderson depicts race relations in a gentrifying inner-city neighborhood; sociologist William J. Wilson delineates the social and economic problems of inner-city blacks; and political scientist Gary Orfield calls for bold efforts to reverse the continuing urban pattern of racial segregation. Part III looks at the way cities have responded to economic and racial change. Economist Kenneth A. Small discusses the impact of transportation policy; political scientist Herbert Jacob finds that increasing efforts to control urban crime have not been effective; and sociologist Terry Nichols Clark emphasizes the effect of political factors on the fiscal condition of cities. Economist Anthony Downs, reviewing the issues raised by the other authors, sees little hope for racial integration as the central social strategy for solving urban problems, but does see hope in the internal resources of America's minority communities.