11.4.4. Special consideration for hilly areas

Try these first

1. 1.

   What is slope stability?

   Hint

   Think about the risks associated with landslides.

2. 2.

   Why is drainage important in hilly areas?

   Hint

   Consider what happens when water accumulates.

3. 3.

   What is the purpose of slope stability in highway design?

   • To allow for steep gradients
   • To prevent landslides
   • To increase construction costs

   Hint

   Recall the risks involved with unstable slopes.

4. 4.

   True or False: Drainage facilities are less important in hilly areas than in flat areas.

   • True
   • False

   Hint

   Think about water management in different terrains.

5. 5.

   Given a hillside with a steep slope, outline the steps you would recommend to design a road that ensures slope stability and effective drainage.

   Hint

   Consider both natural and structural elements in your design.

6. 6.

   Evaluate a proposed highway alignment in a mountainous region with frequent landslides. What considerations should be made to enhance the design?

   Hint

   Think about the environmental factors affecting road stability.