Question

what the use of spiral roads ​

Answer 1

Answer:

Spirals are curves used to transition between a circular curve with a specific radius and degree of curvature and a straight tangent (whose radius is infinity). ... Spiral curves allow railroad cars to proceed into a simple curve without derailing.

Answer 2

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Spirals are curves used to transition between a circular curve with a specific radius and degree of curvature and a straight tangent (whose radius is infinity). ... Spiral curves allow railroad cars to proceed into a simple curve without derailing.