The idea of “sustainable transportation policies” is central to this book. Sustainable transportation policies promote the movement of people and goods in ways that are consistent with sustainable economic development. But, what is “sustainable economic development”? Pezzey (1989) and Pearce et al. (1989) have compiled a number of definitions from the literature; examples of these, plus others, are listed in Exhibit 2.1. The sample in Exhibit 2.1 suggests that there may be almost as many definitions as there are proponents. While these definitions reflect different economic, ecological and social nuances, they all embody an important idea that is the hallmark of “sustainability”: Sustainable development seeks to preserve environmental quality – whether for less advantaged populations, future generations, or the sake of environmental diversity itself – while pursuing opportunities for economic advancement, all leading to an improved quality of life.


Sustainable Development Discount Rate Future Generation Human Development Index Gross National Product 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer 2007

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