state and define different kinds of curved roads
Answers
▪Road curves are regular bends in roads to bring a gradual 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.
▪Four types of circular curves are on roads:
✔Simple curve
✔Compound curve
✔Reverse or serpentine curve
✔Deviation curve
❇SIMPLE CURVE:
⚫A simple curve has the same radius throughout and is a single arc of a circle, with two tangents meeting at the intersection
❇COMPOUND CURVE
⚫A compound curve has two or more simple curves with different radii that bend the same way and are on the same side of a common tangent
❇SERPENTIVE CURVE
⚫Also called a serpentine curve, it is the reverse of a compound curve, and two simple curves bent in opposite directions are on opposite sides of the common tangent
❇DEVIATION CURVE
⚫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.
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