This report summarizes the results of an investigation to design both a suitable asphalt concrete mix and a full-depth asphalt concrete structural section containing the mix, or mixes for a “Long Life Pavement” for a portion of Interstate 710 in Southern California. A companion report (Technical Memorandum, TM UCB PRC-99-3) desribes the asphalt concrete section for use as an overlay on the existing portland cement concrete pavement.