| 词条 | Reverse curve |
| 释义 |
In civil engineering, a reverse curve (or "S" curve) is a section of the horizontal alignment of a highway or railroad route in which a curve to the left or right is followed immediately by a curve in the opposite direction.[1] On highways in the United States reverse curves are often announced by the posting of a W1-4L sign (left-right reverse curve) or a W1-4R sign (right-left reverse curve), as called for in the Manual on Uniform Traffic Control Devices. See also
References1. ^{{cite web| url=https://web.engr.uky.edu/~jrose/RailwayIntro/Modules/Module%206%20Railway%20Alignment%20Design%20and%20Geometry%20REES%202010.pdf| title=Railway Alignment Design and Geometry| first1=Pasi| last1=Lutala| first2=Tyler| last2=Dick| website=University of Kentucky College of Engineering}} {{rail-transport-stub}}{{engineering-stub}} 1 : Railway track layouts |
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