Juan de Dios Ortúzar has managed or advised large transport studies in Latin America and Europe, involving the application of advanced travel demand modelling techniques, and the use of revealed and stated preference data. In particular, he directed the design and implementation work of large scale mobility surveys in Chile, such as those for Santiago in 1991 (33,000 households) and the Santiago on-going survey, that started in 2001–2002 with 15,000 households and interviewed another 5,000 households per year between 2004 and 2007. He also directed the Bogotá 2011 mobility survey, where more than 15,000 households were interviewed.
