REDISCOVERING THE TRANSPORTATION FRONTIER: IMPROVING SUSTAINABILITY IN THE UNITED STATES THROUGH PASSENGER RAIL.

The article discusses improving sustainability in the U.S. through the expansion of the U.S. passenger rail service in urban areas. Topics include the role of transportation in the assessment of urban environmental impacts, the need for diversification of the U.S. transportation system, a historical overview of U.S. passenger rail traffic, and factors contributing to a successful passenger rail system and its subsequent benefits to society.