America’s aging Interstate highways are wearing out, and the majority of the lane-miles and numerous bridges need to be replaced or reconstructed. Congress has taken no action on the 596-page report it requested in the FAST Act, released by the Transportation Research Board in January 2019. Evidently, if the Interstates are going to be modernized, at a TRB-estimated cost of about $1 trillion, this will be the responsibility of their owners, the 50 state governments.
