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。
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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.