This paper describes a parsimonious approach to the economic analysis of transportation investments. In a gravity model of trade, project benefits may be summarized by a money metric for the change in market access experienced by all cities due to the investment. This metric is equivalent to the...

Pollution, alternative fuels, congestion, intelligent transportation systems, and the shift from construction to maintenance all call for a reconsideration of the existing highway revenue mechanisms, especially the gas tax. David Levinson explores the fundamental theoretical basis of highway...

This study provides the first global evaluation of both direct and indirect flood hazard impacts on road transportation networks. It constructs topological road networks for 2,564 human settlements, representing over 14 million kilometers of urban roads. It assesses their exposure to pluvial and...

This paper presents a policy framework intended to maximize the benefits of dockless bike share through outcome-oriented system planning that includes monitoring and enforcement of regulations. Operational shortfalls of dockless bike share are categorised and several policy options for each...

January 1999 - National and urban motor vehicle ownership increases at about the same rate as income, whereas road length increases with income mainly at the national level. So, urban congestion grows with income. Controlling vehicle fleet growth and use would require high taxes that increase...