Transport in a sustainable urban future

Transport is acknowledged as a vital ingredient of any credible strategy for the sustainable city because of the key role it plays in promoting economic development, quality of life and wellbeing. Yet managing urban transport effectively, given its complex and intersecting economic, environmental and social impacts, is also precisely the kind of ‘wicked problem’ that policy makers consistently find hard to resolve (Docherty and Shaw, 2011a; Conklin, 2006; Rittel and Webber, 1973). Many of the reasons for this are longstanding and emanate in particular from the dominance of the private car in meeting the demand for mobility, which has built up over many decades in the developed world, but which is now being reproduced at a much higher pace in the fast growing cities of the Pacific Rim and elsewhere (Newman and Kenworthy, 1999; Lyons and Loo, 2008). Although it has undoubtedly transformed our patterns of travel and consumption, concerns over the limitations and externalities of private car transport – primarily traffic congestion, environmental degradation and social exclusion – have for many years stimulated various initiatives designed to mitigate these externalities (Feitelson and Verhoef, 2001; Knowles et al, 2008). The conflict between the car, long promoted by neoliberal voices as a potent weapon of the free market and individual liberty, and competing visions of a more ‘public’ transport system based on collective modes such as the bus and train, and active travel by walking and cycling, has been played out over many years. Nowhere has this conflict been more intense than in cities, as it is here that the problems such as congestion, poor local air quality and mobility deprivation are often at their most intense (Cahill, 2010; Docherty et al, 2008)