在德州中部的一些免费公路也将设立收费站，其中包括一条通往奥斯汀机场的繁忙公路。

Other free highways in central Texas could also be converted to tollways, including a popular route to the airport in Austin.

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未来的公路和现在的非常相似，但它们很可能将不再免费。

The road of the future will look much like the road of the present, but it most certainly won't be free.

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此外，马德里还有大量未充分利用的、昂贵的基础设施，比如，尽管新的收费公路网免费，但去往马德里的路上却常常遇到交通堵塞，因为司机们都想省钱。

But there is more underused, high-cost infrastructure, such as a network of new toll roads that is struggling as cash-strapped drivers stick to clogged-up, but free, routes into Madrid.

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