The document discusses airport pavement design methods, including the Flexible and Rigid pavement types. It describes the layers of surfaces, base, and subbase courses and their functions. It covers the CBR method developed by the US Corps of Engineers for airport pavement design, which considers aircraft wheel loads and pressures. Variables in the CBR method include soil CBR values, aircraft type and traffic, and material specifications. Examples are given for calculating layer thicknesses using the CBR and FAA methods.