The NATO/CCMS Automotive Propulsion Systems (APS) Pilot Study has been an important factor influencing and accelerating the trend toward increased international cooperation in the transportation sector--on national, international, and private bases. The prime effort of the Pilot Study has been devoted to organizing and implementing four international symposia in 1973, 1974, 1975, and 1977 in accordance with the provision of the LPPSD Memorandum of Understanding. The Working Group has agreed that from a technological viewpoint, much stronger relationships and benefits could be derived from projects focused on specific problem areas and development themes. Several areas have been discussed and recommended for initial exploration of specific international cooperative projects; namely, Power systems and components, High temperature materials, Alternative fuels, Electric and hybrid vehicle systems and, Harmonization or correlation of emission standards and procedures. The findings of the Pilot Study have resulted in three resolutions regarding national programs for automotive research and development and in four recommendations establishing a framework for fostering continued international cooperation. These resolutions and recommendations are provided in this report.