2.6.2. Length of a transition curve

Try these first

1. 1.

   What is a transition curve?

   Hint

   Think about how roads bend.

2. 2.

   What does 'h' represent in the super-elevation formula?

   Hint

   It is a measurement related to angles.

3. 3.

   What is the formula for the length of a transition curve based on super-elevation?

   • L = n * h
   • L = h / n
   • L = h + n

   Hint

   What do you need to multiply?

4. 4.

   True or False: Radial acceleration for a curve should exceed 30 cm/sec² for better safety.

   • True
   • False

   Hint

   Think about what level keeps passengers comfortable.

5. 5.

   A highway is designed with a radius of 200 m and a vehicle speed of 50 m/s. Calculate the necessary transition curve length assuming the maximum radial acceleration is 25 cm/s².

   Hint

   Use the relationship between motion and curvature.

6. 6.

   A railway track has a super-elevation of 6 cm. If the curve applies super-elevation uniformly with a rate of 1 in 500, determine its transition curve length.

   Hint

   Think about the direct proportionality in the rates.