Calculate the minimum curve length to provide visability when designing a roadway to allow for visability of objects by pedestrians / drivers to support visual safety in road design.

Sight Distance (S) | |

Initial Roadway Grade (g_{1}) | |

Final Roadway Grade (g_{2}) | |

Height of driver's eye above Roadway surface (h_{1}) | |

Height of object above Roadway surface (h_{2}) |

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