What specific unit helps measure how much damage all the different heavy trucks do to a road, by turning them into one standard number?

The specific unit that helps measure how much damage all the different heavy trucks do to a road, by turning them into one standard number, is the Equivalent Single Axle Load (ESAL). An ESAL represents the damage caused by one pass of a standard axle load, which is universally defined as an 18,000-pound (80 kilonewton) single axle fitted with dual tires. The primary purpose of ESAL is to standardize the diverse damaging effects of all vehicle types and weights into a single, comparable unit. This allows pavement engineers to accurately predict and manage the cumulative impact of various traffic loads on road infrastructure. The core principle behind the ESAL concept is that pavement damage increases exponentially with axle load, specifically appr....