Sustainability is now the buzzword in transport and Brian Caulfield is one of Ireland's leading experts in the area of sustainable mobility. He is an associate professor at the department of civil, structural and environmental engineering and is producing a high volume of research that is directly informing Ireland' shifting transport policy landscape. For his policy changes, he chose a cross party transport infrastructure plan, imposing parking limits in cities, and prioritising the electrification of taxis and car shares. For his personal changes he discussed buying an electric car and flying less.