Example 2 A pavement system with the resilient moduli, layer coefficients, and drainage coefficients are shown in figure below. If predicted W₁ =ESAL = 18.6 x 10%, R = 95%, S, = 0.35, and APSI = 2.1, select thicknesses D₁, D₂, and D3. E₁-400,000 psi aj -0.42 D₁ E2 - 30,000 psi 0.14 = ية my-1.2 D₂ E₁ = 11,000 psi a,-0.08 my = 1.2 Dy MR - 5,700 psi Book: Pavement Analysis and Design by Huang (2nd edition) Page 520