"Investments in transportation infrastructure have substantial economic benefits, in both the short and the long run. Evidence of these benefits is clearly visible in many of the infrastructure projects that have recently been completed throughout the country. These investments, some of which are described in this report, result in the following benefits for Americans and our nation's economy: 1) Reduced congestion in key bottleneck areas, such as the I-10 bridge span replacement in New Orleans, LA and the new Woodrow Wilson Bridge connecting Virginia and Maryland, which helps to reduce the estimated $100 billion in congestion costs on roads and highways in urban areas. 2 )Improved safety on our nation's highways and bridges, such as the reconstruction of the I-10 / I-95 interchange in Jacksonville, Florida, which can both save lives and reduce bottlenecks on key thoroughfares. 3) Expanded public transit services to new communities, such as the Green Line light rail extension in Portland, OR, which get commuters and other travelers to their destinations in more efficient, less congestion-prone ways. 4) Rehabilitated and much-needed maintenance of aging infrastructure, such as the rehabilitation of a stretch of I-77 in North Carolina, which often results in the some of the highest returns on infrastructure investment. The U.S. economy relies heavily on transportation infrastructure, and these investments to improve the condition and performance of our infrastructure allow people and goods to move more efficiently and safely around the country. Without a well-functioning system of roads and highways, public transit, railways, seaports, and aviation, much of the activity in the U.S. economy would grind to halt."
United States. White House: http://www.whitehouse.gov/