In the Group Index method of flexible pavement design, which one of the following factors decides the thickness of base and surface course ?

- 1
  
  percentage of sub-grade soil passing 75 micron sieve.
- 2
  
  type of surface and base course materials.
- 3
  
  daily volume of commercial vehicles.
- 4
  
  percentage of liquid limit of subgrade soil.

Display Comments

Leave a comment

Login at first then you can submit comment. Click here to login.