How will we get around? What energy and what objects will we use? Will transport methods be driverless? Will they be collective or individual? To answer these questions, we must understand how customs and needs are changing in a world where more and more journeys (80%) are made by car. Will sustainable solutions emerge thanks to technology or as a result of greater frugality? This is the question addressed in this episode of Ça change tout. Journalists Thierry Guerrier and Yolaine de la Bigne spoke with Mathieu Chassignet, a graduate of Paris’ prestigious ENPC engineering school, in charge of travel and air quality at Ademe, and Patrick Pélata, an alumnus of the elite École Polytechnique, former CEO of Renault, and who is now a consultant on the transformations to the automotive industry.