A proper AASHTO spreadsheet is built around the fundamental empirical equation that predicts the number of 18,000 lb Equivalent Single Axle Loads ( W18cap W sub 18 ) a pavement can withstand. Design Traffic ( W18cap W sub 18

A AASHTO flexible pavement spreadsheet includes:

Flexible pavement design is a critical component of civil and highway engineering. It ensures that roads can withstand traffic loads over a specific design life.

“PSI loss from 4.5 to 2.5,” Mara said. “Terminal serviceability. Verified.”

Once the required SN is known, the spreadsheet evaluates a proposed pavement structure using the layer thickness equation: