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...

Public-private partnerships (PPPs) are an important vehicle for private participation in infrastructure investment, delivery and management. Renegotiations are an integral part of the PPP process but their prevalence varies markedly in different parts of the world. Renegotiations can be usefully...