Abstract
At present, the pavement design method of the national routes' is shifting from the empirical method to the theoretical one with the performance regulation introduction by the internationalization of the design method. In the design specification published by the Japan Road Association (JRA), the failure criterion proposed by US-Asphalt Institute (AI) is recommended for the asphalt pavement design, and this specification shows some examples based on the fatigue failure analysis of asphalt mixture and the rutting analysis. However, these examples are shown for the heavy volume traffic only, and the applicability of the AI's criterion for the low volume traffic is not confirmed yet.
In this study, the analytical rutting results using the AI's criterion and another estimating method were compared, and in this comparison the I-2-IV traffic structures which designed by the TA method in the farm road specification were used. As the results, it was found that the Al's criterion was not applicable for the low volume traffic asphalt pavements like the farm roads, and the pavement structure might be excessively when the present design specification by JRA was applied to the III-IV traffic pavement.
