title: Erratum to: Cluster categorization of urban roads to optimize their noise monitoring.
authors.affiliation: Department of Earth and Environmental Sciences, Università degli Studi di Milano, Bicocca, Piazza dalla Scienza 1, 20126, Milan, Italy. giovanni.zambon@unimib.it.
authors.forename: G
authors.initials: G
authors.lastname: Zambon
authors.affiliation: Department of Earth and Environmental Sciences, Università degli Studi di Milano, Bicocca, Piazza dalla Scienza 1, 20126, Milan, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Benocci
authors.affiliation: Istituto di Acustica e Sensoristica "Orso Mario Corbino", CNR, Via del Fosso del Cavaliere 100, 00133, Rome, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Brambilla