Illustration of the application of a detailed methodology for evaluating changes to an existing mix of transportation modes. The setting for the example is a geographical region that is part of the Northeast Corridor of the United States. Two alternative environments and three alternative transportation mixes are specified for the region over the time period 1970-2000. Populations in the region's cities and distributions within these cities are assumed for each environment. Separate evaluations are performed to determine both user and societal benefits. (See also RM-6324, Vols. I and II.) 151 pp. Ref.