roadbed
['roʊdˌbed]
n.
（铁路的）路基;
（道路的）路床;
（道路的）车行道;
路面;
例句:
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The earthquake made the roadbed cave in.
地震后路基沉陷了.
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He flopped to the sandy roadbed and twisted like an injured snake.
他扑倒在沙土路上像一条受了伤的蛇一般蜷缩成一团.
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Put up your hands to build a home of the roadbed.
搭起双手筑成你回家的路基.
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The street's brick roadbed now pushes up through the asphalt in big patches, and nearly every other house is empty or for sale.
来自NEWYORKER