By Danny Gierhart, P.E.
How thick should I specify the asphalt on my project, considering the number and types of traffic loads I expect, and the support I think the subgrade will provide?” That is the basic question posed by engineers who want their pavement to last a long time, and in good condition.
Pavement thickness designs are too often based on economics — how thick can the pavement be built with the dollars available for the project, regardless of the engineering realities. Or they are simply empirically-based — what has been observed to perform under similar conditions before. (more…)