Aashto Flexible Pavement Design Excel Spreadsheet

She started with 5 inches of HMA (5 * 0.44 = 2.2). Then 8 inches of crushed base (8 * 0.14 = 1.12). Running total: 3.32. Needed 0.88 more. Subbase? That would require 8 inches of gravel (8 * 0.11 = 0.88). Total SN = 4.32. Perfect.

Required SN = 3.95

The AASHTO flexible pavement design centers on finding a —an abstract index representing the total required structural capacity. The fundamental equation relates traffic demand to capacity based on the following key inputs: Design Traffic ( W18cap W sub 18 aashto flexible pavement design excel spreadsheet