In 2000, the average driver in US metropolitan areas endured 27 hours of traffic delays, a rise from 7 hours in 1980. In many other countries, traffic delays are considerably worse than in the United States, and in developing countries urban traffic congestion is increasing with alarming...

This study examines impacts on net social benefits or economic welfare of alternative policy instruments for reducing traffic congestion and atmospheric emissions in São Paulo, Brazil. The study shows that expanding road networks, subsidizing public transit, and improving automobile fuel...