The objective of the Human Factors Design of Automated Highway Systems contract was to provide input during the conceptual stages of AHS development on matters of human factors concern, and thereby affect the design and implementation of the AHS and lay the foundation for future AHS advancement. Parallel analytical and experimental tracks were conducted, with intentional cross-talk among the tasks on the two tracks. This report provides a review of the products from each task. Included for each task is the objective, the methodology, and the results. In addition, answers to questions asked during a particular task and answered based on findings from later work are given in the review for the task where the question was first asked. Also, where assumptions about the AHS made earlier in the research effort were changed because of new data or an evolution in thinking about the issue, those changes are presented along with their bases. The implications of findings for the design of the AHS are presented. A section on current concepts of the AHS presents descriptions of the AHS scenarios first developed in the first task but now modified to reflect the changed assumptions and other data findings.