Private transport, i.e. the car, shows a growing incompatibility with accessibility and liveability. Low-emission vehicles will not deliver a sustainable solution.
Public transport systems have to embrance strategic and spatial functionality, and so address a wider range of sustainability issues, offering a de facto collective space to compensate for public space eroded by privatization and building for commercial gain. Transport systems have a long history of driving urban development.
Lately, many cities in Europe, recalling the efficiencies of nineteenth-century systems, have reintroduced trams. The modern tram is, however, a long way from its noisy, clattering ancestors. It must be different in order to lure modern commuters out of their cars.
in THE ECO-DESIGN HANDBOOK, Thames & Hudson, London, 2005