Chart Of Federal, State And Local Government Spending On Highways From 1956 To 2014

From Columbia Ideas at Work, "As Highways Crumble, the Private Sector Steps Up — for a Price" by Matt Schiavenza, based on reseacrh by Prof. Robert Phillips and Prof. Garrett van Ryzin:

Federal, state and local government spending on highways in billions of 2014 dollars.
Data: Congressional Budget Office
Source: Columbia Ideas at Work