Why has it become insolvent?
Have states like, I dunno - Massachusetts, habitually mispent or misinvested their highway funds on bike lanes and rail trails?
That leaky $20 billion homicidal hole, and its environmental offset requirements, known as the Big Dig certainly wasn't money well spent. We'll be paying for Mike Dukakis' and Fred Salvucci's misadventure for generations.
State governments need to bid and compete with each other for Federal Highway funds to hold them to account for their mismanagement of local, state, and Federal funds.
On April 13, the U.S. Chamber of Commerce and a number of transportation and labor groups wrote the House and Senate transportation committees urging creation of a VMT to offset dwindling fuel tax revenues and restore solvency to the Highway Trust Fund.
Once again, a Senate Republican has been lead astray by the US Chamber of Commerce.