Evolution of vehicular emission factors, from 2001 to 2018, in Sao Paulo, Brazil, evaluated by tunnel measurements.

Maria de Fatima Andrade, USP University of Sao Paulo, São Paulo, Brazil, Regina Maura Miranda, University Sao Paulo, Sao Paulo, SP, Brazil, Guilherme Librete Oliveira, EPUSP Polytechnic School of the University of Sao Paulo, Sao Paulo, Brazil and Thiago Nogueira, USP University of Sao Paulo, Sao Paulo, Brazil