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What Does Sustainability Mean to Transportation Agencies? 3 Chapter 2 What Do es Sustainability Mean to Transportation Agencies? Transportation GUIDING PRINCIPLES OF SUSTAINABILITY agencies sh ould apply the general What is sustainability? What is a transportation agency's role in sustainability supporting sustainability? While attention to sustainability has principles within their grown, defining and incorporating sustainability into day-to-day specific transpor tation business presents a challenge to agencies. context. They can set their own goals to support broader In general, sustainability encompasses a holistic consideration of sustainability and play economic, social, and environmental progress--usually referred their part in promoting to as sustainability dimensions--with a long-term perspective. a sustainable future. Sustainability includes not only conditions today but addresses the needs of future generations as well. And sustainability incorporates equity among socioeconomic and demographic groups, both today and over time. The fundamental principles of sustainability as envisioned in this guidebook are that sustainability entails meeting human needs for the present and future while: · Preserving and restoring environmental and ecological systems, · Fostering community health and vitality, · Promoting economic development and prosperity, and · Ensuring equity between and among population groups and over generations. This guidebook follows the traditional triple bottom line approach to sustainability as expressed by the environmental, social, and economic dimensions. Additionally, the researchers view the principle of equity as reinforcing the other sustainability dimensions, as a support to the three-legged