3.1. Agor, R., (1980), Surveying, Vol-1 and II, Khanna Publishers, Delhi.

Try these first

1. 1.

   What are the elements of a simple circular curve?

   Hint

   Think about the main parts that define a circle.

2. 2.

   Define super-elevation.

   Hint

   It helps counteract centrifugal force.

3. 3.

   What is a transition curve?

   • A curve that connects two straight paths
   • A curve that connects straight to circular
   • A circular curve

   Hint

   Remember its purpose in road safety.

4. 4.

   True or False: A parabolic curve is typically used for vertical applications in highways.

   • True
   • False

   Hint

   Consider the advantages it provides over others.

5. 5.

   A roadway is designed to transition from a straight path into a circular curve of radius 800m. Calculate the necessary length of the transition curve if the desired rate of change of radial acceleration is 0.5 m/s².

   Hint

   Don’t forget to convert units where necessary.

6. 6.

   A compound curve connects two straights with a total deflection angle of 70°. Determine the different radii required if the inner radius is 300m.

   Hint

   Look back at the relationships between radii in compound curves.