US DOT’s mission is: “Serve the United States by ensuring a fast, safe, efficient, accessible and convenient transportation system that meets our vital national interests and enhances the quality of life of the American people, today and into the future.” The DOT Strategic Sustainability Performance Plan, published in June, sets DOT sustainability policy, including commitments to comply with environmental and energy statutes, regulations, and executive orders. It establishes agency sustainability performance metrics, including greenhouse gas reduction targets, energy intensity, renewable energy, fuel reduction, waste prevention, acquisition and recycling goals, integrates sustainability with DOT’s  budget  planning process and identifies additional resources needed to achieve set goals, evaluates DOT’s climate change risks and vulnerabilities to manage the effects of climate change on DOT’s operations and mission in both the short and long term, considers environmental measures as well as economic benefits, social benefits, and costs in evaluating projects and activities based on life-cycle return on investment.

Also, the Federal Highway Administration, under the US DOT, has a website with a variety of sustainability-related resources, covering everything from Critter Crossings, Bike & Pedestrian Programs, Cleaner Air Exchange and other items, including Secretary of Transportation Ray LaHood’s blog:  http://fastlane.dot.gov/