2.3.2. Designation of horizontal curves

Try these first

1. 1.

   Define a simple circular curve.

   Hint

   Think about how curves are used in paths or tracks.

2. 2.

   What is the degree of curve?

   Hint

   Focus on the specific length mentioned in our discussions.

3. 3.

   How is a simple circular curve designated?

   • By its length only
   • By its radius or the degree of curve
   • Only by its degree

   Hint

   Recall our discussion on the definition of curve designation.

4. 4.

   The degree of curve is based on a chord of what length?

   • 20 m
   • 30 m
   • 50 m

   Hint

   Request yourself to remember the standard used.

5. 5.

   You have a circular curve with a degree of 10. Calculate its radius using both the exact and approximate methods. Compare the results and explain any differences.

   Hint

   Use a calculator for sine values to compare.

6. 6.

   A roadway curve is designed with a degree of 20. Discuss potential issues and implications that may arise with traffic using such a curve at high speeds.

   Hint

   Refer back to safety principles in your rationale.