Lighting, visibility, and railroad-highway grade crossings
By: Transportation Research Board, Commission on Sociotechnical Systems, National Research Council.
Series: Transportation research record ;; 628
Publisher: National Academy of Sciences
Published: 1977
Place of publication: Washington
Language: eng
Number of pages: 56
Subjects: Roads -- Visibility.; Roads -- Lighting.; Railroads -- Crossings.; Highway-railroad grade crossings.
Notes: Includes bibliographical references.