28.1. Overview

Try these first

1. 1.

   What does CBR stand for?

   Hint

   Think about soil testing methods.

2. 2.

   What is the maximum msa considered in the new IRC guidelines?

   Hint

   Recall the revised pavement design capacity.

3. 3.

   What does CBR stand for?

   • California Bearing Ratio
   • Canadian Bearing Ratio
   • Child Bearing Ratio

   Hint

   Focus on the testing context.

4. 4.

   True or False: The new IRC guidelines for flexible pavements allow designs up to 200 msa.

   • True
   • False

   Hint

   Think about the limits established by the IRC.

5. 5.

   If a new bypass road has a design life of 20 years and anticipates 300 CVPD with a growth rate of 5%, calculate the approximate msa it would need to support.

   Hint

   Remember to consider the growth over two decades.

6. 6.

   Discuss the implications of using an empirical design method for a new urban road intended for at least 100 msa traffic.

   Hint

   Think about how outdated practices can undermine modern engineering demands.