Gilles Roucolle is the general director for Europe of the consulting firm Oliver Wyman. He has been dedicated to transport for more than 30 years.

He publishes in April the book 'Transformations in Mobility: Trends, Disruptions and the Future of Mobility and Transport' The book addresses the big changes and challenges in the way we move for the coming decades. The imperative is to shift to green technologies and sustainably support people's travel, he tells EL PAÍS. He says: “Transport is the second source of greenhouse gas emissions in the world”