PRATELLI, Antonio; SECHI, Paolo; SOULEYRETTE, Reginald Roy. Upgrading Traffic Circles to Modern Roundabouts to Improve Safety and Efficiency – Case Studies from Italy. Promet - Traffic&Transportation, [S. l.], v. 30, n. 2, p. 217–229, 2018. DOI: 10.7307/ptt.v30i2.2571. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2725. Acesso em: 26 aug. 2025.