"highway “user fees” pay only about half the cost of building and maintaining the nation’s network of highways" http://www.frontiergroup.org/reports/fg/do-roads

"highway “user fees” pay only about half the cost of building and maintaining the nation’s network of highways" http://www.frontiergroup.org/reports/fg/do-roads-pay-themselves#sthash.3OlYPNX5.dpuf http://www.frontiergroup.org/reports/fg/do-roads-pay-themsel... https://cdn.theatlantic.com/assets/media/img/posts/2015/05/road_myth_fig3/846377220.jpg https://cdn.theatlantic.com/assets/media/img/posts/2015/05/r... And of course that doesn't take the environmental externalities into account.