15.2.3. Attainment of super-elevation

Try these first

1. 1.

   What is super-elevation and why is it important?

   Hint

   Think about how this helps vehicles navigate curves.

2. 2.

   Name the two methods to attain super-elevation.

   Hint

   One involves shifting and the other involves rotation.

3. 3.

   What is the primary goal of super-elevation?

   • To enhance drainage
   • To improve vehicle stability on curves
   • To reduce costs

   Hint

   Think about the forces at play when taking a turn.

4. 4.

   True or False: The diagonal crown method is used to narrow the inner cross-section.

   • True
   • False

   Hint

   Recall what shifting the crown achieves.

5. 5.

   A highway curve measures a radius of 200 m. Calculate the super-elevation needed for a vehicle traveling at 90 km/h considering lateral friction.

   Hint

   Use the formula e = (0.75v)^2 / (gR) to simplify.

6. 6.

   You have a curved road where a truck with a high center of gravity must navigate. Discuss whether the rotation about the center line or inner edge would provide better stability. Justify your response with principles of super-elevation.

   Hint

   Evaluate how each method affects vehicle dynamics.