Methodologies for quality assessment of highway operators based on governance best practices with emphasis on toll collection ecosystem - Santos, Alessandro Santiago dos; Leal, Adriano Galindo; Oliveira, José Augusto de; Moreira, José Rita; Pistoni, Edson; Miyake, Mario Yoshikazu; Rigo, Antônio Luiz; Marte, Cláudio Luiz (Case Studies on Transport Policy, 2017)