2.6. Transition Curves

Try these first

1. 1.

   What is super-elevation?

   Hint

   Think of how roads are tilted at curves.

2. 2.

   Define transition curve.

   Hint

   Consider why smooth transitions are needed.

3. 3.

   What is super-elevation primarily used for?

   • To increase vehicle speed
   • To counteract centrifugal force
   • To provide scenic views

   Hint

   Reflect on the physical forces acting on a vehicle in motion.

4. 4.

   A transition curve is defined as:

   • True
   • False

   Hint

   Think about why curves are designed to connect smoothly.

5. 5.

   A transition curve has a radius of 80 m. Compute the required length for a vehicle to transition safely at a speed of 15 m/sec. Assume a super-elevation rate of 1 in 150.

   Hint

   Plug in your values for n, b, v, g, and R to find L.

6. 6.

   Discuss how inadequate super-elevation could affect different types of vehicles differently (e.g., cars vs. trucks).

   Hint

   Use examples from vehicle dynamics to illustrate your points.