17.1. Length of vertical curve

Try these first

1. 1.

   Define a vertical curve.

   Hint

   Think about how grades change in a roadway.

2. 2.

   What does the rate of change of grade indicate?

   Hint

   Consider the speed of transition in slope.

3. 3.

   What is the purpose of a vertical curve in roadway design?

   • To connect two different grades
   • To increase road speed
   • To create sharper turns

   Hint

   Think about the safety of drivers.

4. 4.

   A vertical curve connects road grades of +3% and -2% with a rate of change of 0.5%. What is the length of the curve?

   Hint

   Focus on finding the difference first.

5. 5.

   Determine the length of a vertical curve required to transition from a +1.5% grade to a +4% grade over a 50 m distance, with a rate of change of 0.2%.

   Hint

   Start by calculating the difference in grades.

6. 6.

   Explain how vertical curves impact driver behavior and safety, providing statistical or anecdotal evidence.

   Hint

   Consider safety reports and traffic data in your response.