摘要: |
The federal government's surface transportation programs are financed mostly through the Highway Trust Fund. Revenues from a variety of transportation-related excise taxes are credited to the fund; the largest share comes from federal taxes on gasoline, including gasoline that is blended with ethanol. Those revenues are allocated to two separate accounts within the fund, one for spending on highways and one for spending on mass transit. Although the funds balances were stable for many years, for much of the past decade its outlays have exceeded receipts. In recent years, the shortfall has been covered by transfers from the U.S. Treasury's general fund. Policies that are designed to reduce gasoline consumption, including those that would impose stricter standards for the fuel economy of vehicles, could decrease revenues for the trust fund and thus could add to the shortfall. |