Contributions of Pavement Structural Layers to Rutting of Hot Mix Asphalt Pavements

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Contributions of Pavement Structural Layers to Rutting
of Hot Mix Asphalt Pavements

In recent years, many states have experienced an increase in 
the severity and extent of permanent deformation (rutting) in 
hot mix asphalt (HMA) pavements. The increased rutting has 
been attributed to increases in truck tire pressures, axle loads, 
and traffic volumes. Tire pressure and axle load increases mean 
that HMA near the pavement surface is exposed to higher 
stresses than the levels assumed when structural designs are
performed in accordance with the 1993 AASHTO Guide for
Design of Pavement Structures
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