The results indicate that consistently higher RM values are obtained when using the T294-921 testing method than when using the 'r292-91I testing method, and the degree of increase depends on the type of aggregate. The variability of RM values due to testing procedure was found to be higher than that due to aggregate source. One aggregate type experienced a lower MCOV when using T294-92I than when using T292-91I, but the other aggregate type exhibited an opposite trend. Overall the RM values range from 41.3 to 261.8 MPa. depending on hulk stress. material type, and testing method, and they are slightly lower than those reported in the literature.