2. Transition Curves
The chapter focuses on the analysis and design of horizontal and vertical curves in road and railway engineering. It covers the geometric principles underlying curve design, including super-elevation, transition curve length, and the characteristics of various curve types. The importance of curves in ensuring vehicle safety, comfort, and operational efficiency is emphasized through mathematical relations and practical design considerations.
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Sections
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4.7Example 2.7
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4.8Example 2.8
What we have learnt
- Super-elevation is crucial for maintaining vehicle stability on curves.
- The length of transition curves can be determined by various methods, including experiential knowledge.
- Vertical curves, whether summit or valley, are essential for ensuring good visibility and smooth gradient changes.
Key Concepts
- -- Superelevation
- The banking of a road or railway curve to counteract the centrifugal force acting on the vehicle, improving safety and comfort.
- -- Transition Curve
- A curve that gradually changes a vehicle's path from a straight line to a circular curve, allowing for a smoother connection.
- -- Vertical Curve
- A curve used in vertical alignment of roadways to provide a gradual change in the gradient, which is typically parabolic in shape.
Additional Learning Materials
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