IN THIS ISSUE: The Role of Mass Transit in Urban Transportation Systems /2 (Basic mobility for all can be achieved with balanced urban transportation systems that include both private automobiles and mass transit facilities, in the view of Arnim H. Meyburg, associate professor of civil and environmental engineering.) ... Saving Transportation Energy: Issues in the Analysis of Alternatives /11 (Policy decisions on how to save fuel should be based on improved methods of analysis, according to Frank J. Cesario, assistant professor of civil and environmental engineering, who offers suggestions on how fallacies and shortcomings of recent analyses can be avoided.) ... Transportation, Economics, and the Shaping of Urban America /19 (Which comes first??nsportation planning or economic development? The need to integrate economic analysis into planning strategies is discussed by Richard E. Schuler, assistant professor of economics and of civil and environmental engineering.) ... Railroad Abandonment: Can the Local Road System Take the Impact? /24 (Consequences of decisions to eliminate rail facilities, especially the impact on agriculture, are examined by Lynne H. Irwin, assistant professor of argicultural engineering, who offers recommendations for national policy revision.) ... Magnetic Levitation of Trains and Related Possibilities in Magneto-Mechanics /32 (Although currently sidetracked in the United States, MAGLEV trains are being developed and will offer "fantastic" high-speed rides in the future. Francis C. Moon, associate professor of theoretical and applied mechanics, describes MAGLEV-related Cornell research and its potential.) ... Register /42 ... Faculty Publications /44