This report describes the construction of the CAL/APT Goal 3 overlays and details observations regarding current Caltrans procedures which are intended to help improve the performance of Caltrans overlays. The main objective of Goal 3 is the comparison of the performance of a Gap Graded Asphalt Rubber Hot Mix (ARHM-GG) overlay with that of a conventional Dense Graded Asphalt Concrete (DGAC) overlay. Based on Caltrans design procedures, ARHM-GG overlay thicknesses are typically half of the equivalent DGAC overlay. These overlays represent typical pavement structures currently in use throughout California (1). The complete plan for HVS and laboratory testing and associated analyses is outlined in the Goal 3 test plan (9).

This report is the third in a series which describe the results of tests and their interpretation on full-scale pavements designed and constructed according to the procedures of the California Department of Transportation (Caltrans) at the Richmond Field Station (RFS) of the University of California at Berkeley (UCB). It describes the results of the Heavy Vehicle Simulator (HVS) test on the third of four pavement test sections, an asphalt-concrete section containing an asphalt treated permeable base (ATPB) designated Section 502CT. The tests on these four test sections have been performed as part of Goal 1 of the Strategic Plan of the Caltrans Accelerated Pavement Testing, or CAL/APT program (1).

This report is the fourth in a series which describe the results of tests and their interpretation on full-scale pavements constructed at the Richmond Field Station (RFS) which have been designed and constructed according to Caltrans procedures. It describes the results of the Heavy Vehicle Simulator (HVS) test on the fourth of four pavement test sections , an asphalt-concrete section containing an untreated aggregate base designated Section 503RF. The tests on these four test sections have been performed as part of Goal 1 of the CAL/APT Strategic Plan (1).