page_title: Road curve
section_title: Deviation curve
hierarchical_section_title: Road curve / Horizontal Curve / Deviation curve
caption_attribution_description: Curve
context_page_description: Road curves are irregular bends in roads to bring a graduation change of direction. Similar curves are on railways and canals.
  Curves provided in the horizontal plane are known as horizontal curves and are generally circular or parabolic. Curves provided in the vertical plane are known as vertical curve.
  Five types of horizontal curves on roads and railways:
  Simple curve
  Compound curve
  Opposite or serpentine curve
  Deviation curve
  Two types of vertical curves on roads:
  Valley curve
  Summit curve
context_section_description: A deviation curve is simply a combination of two reverse curves. It is used when it is necessary to deviate from a given straight path to avoid intervening obstructions such as a building, a body of water, or other significant site.
caption: Diagram of deviation curve
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