This study describes in general terms the present status of grade crossing inventories, improvement programs and other significant considerations. It identifies available information with respect to the cost of accidents and motor vehicle operations, as well as the preparation of estimates of the number of crossings in classes related to the volume of train movements and the volume of vehicle traffic. From these estimates, the number of crossings at which improvements would yield benefits in excess of costs was estimated, together with the reduction in accidents which those improvements could be expected to bring. It develops a five-year program of study related to policy formulation, program administration and research; also, it identifies and describes projects which can be initiated as action programs, research and special studies. This includes a recommended program to correct data deficiencies and develop a comprehensive information system.