SØRENSEN, Michael. Grey Road Sections on Main Roads in Rural Areas: - Development, application and assessment of a Category Based Identification Method. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 13, n. 1, 2006. DOI: 10.5278/ojs.td.v13i1.5252. Disponível em: https://journals.aau.dk/index.php/td/article/view/5252. Acesso em: 19 mai. 2024.