The purpose is to review the status of knowledge as of June 1968 regarding roadway illumination at rural at-grade intersections and to summarize current practices. Over 300 references have been reviewed. From this review of literature and the results of a survey of current practices, it was determined that very few research studies pertaining to illumination problems at rural at-grade intersections have been conducted; but the need for such work has been shown by the interest states and other organizations indicated in their replies to survey questionnaires. The scarcity of developed programs of intersection illumination across the country substantiates the need for standard lighting programs and warrants for these rural problem areas. Background information on the extent of current practices in the area of rural at-grade intersections was obtained by survey questionnaires sent to 49 state highway departments and various other organizations and industries concerned with roadway lighting problems. Replies indicated that very few programs were in operation but that there was a widespread interest in roadway illumination programs. /author/
Samenvatting