The building and repairing of roads in America is paid for by a federal petrol tax, which replenishes the highway trust fund.

美国的道路建设和修缮由联邦燃油税支付，后者被纳入公路信托基金统一管理。

Without new funding, some Democratic leaders have warned, a new, six-year transport bill will have to trim annual highway spending by about a third to keep up with falling petrol-tax revenues.

部分民主党领导人已发出警告：没有新资金来源，新的六年期交通法案将被迫削减三分之一的年度高速公路支出，以与持续下降的汽油税收入相适应。

The 1956 highway bill levied a tax of 3 cents on each gallon of fuel -- equal to 24 cents today.

年的高速公路法，授权每加仑汽油征收 3 美分的公路税，相当于现在的 24 美分。