Transportation is a vital sector of the U.S. economy based on consumers', firms', and government's enormous expenditures in money and time and on its effect on virtually all other sectors in the economy. I assess the performance of the transportation system and consider how it could be improved by analyzing whether the United States has the optimal mix of public and private provision. The empirical evidence indicates that our hugely important transportation system has been compromised by various government policies and the significant welfare costs motivate either vastly improving public provision or expanding the role of the private sector. (JEL H44, H54, H76, L91, L98, R41, R48)