16.5. Summary

Try these first

1. 1.

   Define transition curve.

   Hint

   Think about how it improves driving ease.

2. 2.

   What is a setback distance?

   Hint

   Consider why visibility is crucial at curves.

3. 3.

   What is the main purpose of transition curves?

   • To increase road aesthetics
   • To manage centrifugal force
   • To define road alignment

   Hint

   Think about why sudden changes are dangerous.

4. 4.

   True or False: Setback distances are unnecessary if there are no obstacles on the inner curve.

   • True
   • False

   Hint

   Consider the importance of sight for all drivers.

5. 5.

   Design a transition curve for a highway with a speed limit of 80 km/h and a radius of 300 m, considering super-elevation of 1:120.

   Hint

   Remember to assess comfort and vehicle dynamics.

6. 6.

   Analyze how insufficient setback distances could lead to accidents at a road intersection with multiple lanes and heavy traffic.

   Hint

   Think about common intersection safety issues.