Types of curves
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The document discusses different types of curves used in road design including horizontal curves, vertical curves, simple curves, compound curves, reverse curves, transition curves, sag curves, and crest curves. Horizontal curves provide a gradual turn between two straight sections of road, while vertical curves allow gradual changes in elevation between two sloped roadways. Each type of curve is designed to ease transitions and avoid sharp turns or changes in grade.
Types of curves
- 3. A line which is not straight with no sharp edges is called a curve. It is a smoothly flowing line.
- 5. A horizontal curve provides a transition between two tangent strips of roadway, allowing a vehicle to negotiate a turn at a gradual rate rather than a sharp cut.
- 7. 1.Simple Curve 2.Compound Curve 3.Reverse Curve 4.Transition Curve
- 8. A simple arc provided in the road to impose a curve between the two straight lines.
- 9. Combination of two simple curves combined together to curve in the same direction.
- 10. Combination of two simple curves combined together to curve in the opposite direction.
- 11. A curve of constantly changing radius, used to connect a circular arc to a straight line.
- 12. A vertical curve provides a transition between two sloped roadways, allowing a vehicle to negotiate the elevation rate change at a gradual rate rather than a sharp cut.
- 15. Sag Curves are those which change the alignment of the road from uphill to downhill.
- 16. Crest Curves are those which change the alignment of the road from downhill to uphill.
Editor's Notes
- #12: a curve of constantly changing radius, used to connect a circular arc to a straight line or to an arc of different curvature.