What situations the limiting shear failure of flexible pavement design method could be used?

The limiting shear failure design method for flexible pavement is typically used in situations where the subgrade soil has low shear strength or when traffic loads are expected to be heavy and frequent. It is particularly applicable in areas with high moisture content or poor drainage conditions that could lead to significant deformation under load. This method helps ensure that the pavement structure can adequately resist shear stresses and maintain stability throughout its service life. Additionally, it is useful in the design of pavements subjected to extreme environmental conditions or heavy construction traffic.