reverse curve

noun

1. an S -shaped curve, as on highways and railroad tracks, produced by the joining of two curves that turn in opposite directions.

Example Sentences

The tunnel itself includes a reverse curve, and, at the present time, railroad tracks and Stock Creek waters run through it.

From Project Gutenberg

It is here shown combined with the second volute in the form of a reverse curve.

From Project Gutenberg

At 100 feet a reverse curve brought the cavern on a course parallel to that which it had held up to 60 feet.

From Project Gutenberg