A CBR test or the California Bearing Ratio test is a form of penetration assessment to gauge the subgrade levels of roads and pavements. These kinds of structures, strength is crucial, and the CBR test helps to maintain them to avoid casualties. The strength of the structure is measured by evaluating the pressure required to infiltrate a piece of the soil with a standardized plunger. The readings are used to detect any drawbacks in the soil structure and appropriately rectify the problem.