2002 MnROAD Hot Mix Asphalt Mainline Test Cell Condition Report

The purpose of this document is to report on the performance and various distresses on the MnROAD Mainline HMA sections. Other than simple observations and conclusions, this report will not delve into the causations of the distresses. It is expected that future reports will do so. One observation though is clear; unlike some other test tracks and accelerated test facilities, MnROAD, now eight years old, in a harsh environment, shows that performance is governed as much by the interaction of environment, traffic and material properties as by the interaction of traffic and structural design. It is clear that any proper pavement design must integrate not only structural design but also material properties appropriate to the environment, for all elements of the pavement are under attack, not only by traffic but also the environment, and the environment coupled with traffic.