4.2. Example 2.2

Try these first

1. 1.

   What is super-elevation?

   Hint

   Think about how a bike leans while taking a turn.

2. 2.

   What is a transition curve?

   Hint

   Consider how highways curve gently rather than sharply.

3. 3.

   What is the main purpose of super-elevation?

   • To increase vehicle speed
   • To counteract centrifugal force
   • To enhance aesthetics

   Hint

   Think about physics of turning and forces at play.

4. 4.

   True or False: Vertical curves have no effect on stopping sight distance.

   • True
   • False

   Hint

   Consider how elevation changes might block sight.

5. 5.

   Design a transition curve for a road with a radius of 200 m and a speed limit of 60 km/h, ensuring comfort under standard parameters.

   Hint

   Study the length and rates provided in the content for parameters.

6. 6.

   A highway has a vertical curve changing from a 3% upgrade to a 2% downgrade. Calculate the parameters needed for a smooth transition.

   Hint

   Keep in mind the grade change details.