Low carbon mobility (LCM) features strongly in the debates about the sustainability of cities and their resilience in the face of demographic, economic, and climate change. Transport is a major source of carbon emissions and there are indications that these continue to increase, despite the considerable recent advances in vehicle, engine, and fuel technologies. Reducing carbon emissions from transport may be becoming more difficult, not easier. Further, just what constitutes low carbon mobility is a key concern for researchers, policy makers, and analysts alike.