1. Associate Professor, School of Civil Engineers, Polytechnical Univ. of Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain (corresponding author). ORCID: .
2. Professor, Dept. of Economy, Research Group on Economic Studies: Transport, Labour, and Sustainability, Univ. of A Coruña, Edificio de Investigación Campus de Elviña, A Coruña 15071, Spain.
3. Associate Professor, Dept. of Economy, Research Group on Economic Studies: Transport, Labour, and Sustainability, Univ. of A Coruña, Edificio de Investigación Campus de Elviña, A Coruña 15071, Spain.