![]() The latest of these accomplishments is the development of the mechanistic-empirical pavement design procedure in NCHRP Project 1-37A. Developments over recent decades offered an opportunity for more rational and rigorous pavement design procedures. ![]() It should be no wonder the profession has resorted to largely empirical methods. Environment exposure adds further complications. Pavement materials respond to these loads in complex ways influenced by stress state and magnitude, temperature, moisture, loading rate, and other factors. Traffic loading is a heterogeneous mix of vehicles, axle types and loads with distributions that vary daily and over the pavement design life. Pavement structural design is a daunting task. ![]()
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