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The chapter discusses methods for setting out simple circular curves, including linear methods like ordinates from the long chord, successive bisections of arcs, offsets from tangents, and chords produced. It also covers angular methods like Rankine's method of tangential angles and the two theodolite method. Additionally, compound and reverse curves, their elements, and procedures for setting them out, alongside transition curves and the concept of super-elevation, are explored.
Chapter 1117 sections
The chapter discusses methods for setting out simple circular curves, including linear methods like ordinates from the long chord, successive bisections of arcs, offsets from tangents, and chords produced. It also covers angular methods like Rankine's method of tangential angles and the two theodolite method. Additionally, compound and reverse curves, their elements, and procedures for setting them out, alongside transition curves and the concept of super-elevation, are explored.
Various linear and angular methods exist for setting out curves.
Compound curves involve two circular arcs with different radii meeting at a common point.
Super-elevation is necessary to counteract centrifugal forces acting on vehicles in curves.
Methods for setting out curves that use linear measurements such as chains or tapes.
Techniques for setting out curves that involve the use of angles measured with a theodolite.
A curve made up of two circular arcs with different radii that meet at a common point.
The raising of the outer edge of a road curve to counteract centrifugal force on vehicles.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
1 more question available