2.73. A proposed road consists of a rising gradient of 2% followed by a falling gradient of 4%...

Try these first

1. 1.

   What is the definition of a gradient?

   Hint

   Think about how elevation changes along a road.

2. 2.

   How high is a driver's eye level in our calculations?

   Hint

   It's a common height used in road design.

3. 3.

   What does a 2% gradient indicate?

   • The road rises 2 m per 100 m
   • The road falls 2 m per 100 m
   • No change in elevation

   Hint

   Think about how we measure inclines.

4. 4.

   Visibility calculations are important for which reason?

   • True
   • False

   Hint

   Safety should always be a priority in design.

5. 5.

   Design a road profile connecting a 3% rise to a 5% fall with a parabolic curve of 100 m in length. Calculate the reduced levels at 25m intervals.

   Hint

   Keep the gradient rates in mind and divide the curve accordingly.

6. 6.

   Devise a scenario where the visibility distance is inadequate due to design flaws. How would you redesign it to improve visibility?

   Hint

   Ensure each driver has clear sight for safety.