Rudinger, Georg, Kieran Donaghy, and Stefan Poppelreuter. “Societal Trends, Mobility Behaviour and Sustainable Transport in Europe and North America”. European Journal of Transport and Infrastructure Research 6, no. 1 (January 1, 2006). Accessed August 13, 2022. https://journals.open.tudelft.nl/ejtir/article/view/4323.