17.2.3.1. Ruling gradient

Try these first

1. 1.

   What is a ruling gradient?

   Hint

   Think about its definition in terms of road design.

2. 2.

   What is a limiting gradient?

   Hint

   Consider why cost may affect gradient decisions.

3. 3.

   What is the ruling gradient?

   • The maximum design gradient
   • The minimum design gradient
   • A gradient for drainage

   Hint

   Focus on the definition of ruling.

4. 4.

   True or False: Limiting gradients are always steeper than ruling gradients.

   • True
   • False

   Hint

   Consider what limiting means.

5. 5.

   Consider a new highway needing a ruling gradient in a hilly area. High construction costs threaten your design. Discuss potential gradients you would suggest and justify based on IRC recommendations.

   Hint

   Relate your suggestion to IRC values.

6. 6.

   Faced with a scenario where heavy trucks frequently traverse a new road section, analyze how you would adjust the ruling and limiting gradients.

   Hint

   Think about how traffic types affect gradient choices.