著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL National Research Council (U.S.). Transportation Research Board,"Freeway opetations, railroad-highway grade crossing, and evaluating highway improvements",,National Academy of Science,1982,Transportation research record,,0309033187,,https://cir.nii.ac.jp/crid/1130282269659146880