In some states, revenues from the gasoline tax are used to build and maintain roads.

在一些州，汽油税的收入被用来修建和维护道路。

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The emerging system through which private companies maintain toll roads in some states is a classic BOT model.

私营公司在一些州维护收费公路的新兴系统是典型的 BOT 模式。

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He also notes that the forest service is already struggling to maintain a crumbling network of 386,000 miles of road. Better it fix those roads, he says, than build more.

他同时表示，林业局对维护现有的386,000英里的支离破碎的道路已经非常吃力了，建新路还不如修老路呢。

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It is cheaper to develop air transport to remote, geologically unstable areas, than to build and maintain roads.

ECONOMIST: The Himalayas�� open skies

Additionally, a number of states were chatting up the idea as expenses to maintain roads increased and federal funds declined.

FORBES: Is a Tax by the Mile Coming Down the Road?

Everyone, left and right, understands that the government has a responsibility to maintain the roads it operates.

FORBES: "Intervention" Is Inevitable When The Government Has A Monopoly