Pavement CBR design method

CBR method one of the most basic ways of designing pavement, we have many other more developed methods we can use, like AASHO or ASPHALT INSTITUTE. Yes, the last methods take in consideration all other possible factors as the environment and the development of construction materials.
However, for me personally I prefer to use CBR method, it is fast and reliable way for the predesign of pavement, because you need to know your pavement thickness to be able to start the road geometry design. In addition, you can verify later in the detailed stage your layers thickness by using the other methods, or some stress analysis software, I mad this simple application for you to know the total equivalent layer thickness using the CBR method.

Pavement CBR design method (Civil-soft)

CBR value:
Heavy truck number:
wheel load(Ton)

PS:
The lower the CBR value of a particular soil,the less strength it has.
Heavy truck number after at least a prevision of 10 years after the construction of the road .