16.6. Problems

Try these first

1. 1.

   What is a transition curve?

   Hint

   Think about how vehicles move around corners.

2. 2.

   Why is setback distance important?

   Hint

   Consider obstacles that may block sight when turning.

3. 3.

   What does a transition curve help achieve in road design?

   • Increase friction
   • Smooth transition
   • Decrease radius

   Hint

   Think about how a car turns.

4. 4.

   True or False: Setback distance should always be zero for effective curve design.

   • True
   • False

   Hint

   Consider what happens when you approach a curve.

5. 5.

   Design a transition curve for a road with a radius of 300m and a speed of 70 km/h in hilly terrain where rainfall is frequent. Discuss implications.

   Hint

   Consider the rate of super-elevation suggested in the guidelines.

6. 6.

   Given a complex intersection involving three roads with different curvature, calculate the necessary setback distances and design curve radii.

   Hint

   Analyze interactions between curves and traffic flow.