Here's a nice excerpt from the motivations section, nice because it says a lot of the great things about cycling:
... There's more if you have the time and haven't run out of patience. Click the link above.Whereas a national transportation system conducive to bicycling produces enriched health, reduced traffic congestion and air pollution, economic vitality, and an overall improved quality of living is valuable for the Nation;
Whereas by dramatically increasing levels of bicycling in United States cities tangible and intangible benefits to the quality of life for cities and towns across the country will be realized;
Whereas we now live in a Nation with 300 million people, and that number is expected to grow to 365 million by 2030 and to 420 million by 2050 with the vast majority of that growth occurring in urban areas with limited ability to accommodate increased motor vehicle travel;
Whereas since 1980, the number of miles Americans drive has grown 3 times faster than the United States population, and almost twice as fast as vehicle registrations;
Whereas one-third of the current population does not drive due to age, disability, ineligibility, economic circumstances, or personal choice;
Whereas the United States is challenged by an obesity epidemic, 65 percent of United States adults are either overweight or obese, and 13 percent of children and adolescents are overweight, due in large part to a lack of regular activity;
Whereas the Center for Disease Control estimates that if all physically inactive Americans became active, we would save $77 billion in annual medical costs;
Whereas over 753 of our Nation's Mayors have signed onto the climate protection agreement of the United States Conference of Mayors urging the Federal Government to enact policies and programs to meet or exceed a greenhouse gas emission reduction target of a 7 percent reduction from 1990 levels by 2012;
Whereas the transportation sector contributes one-third of the greenhouse gas emissions in the United States and passenger automobiles and light trucks alone contribute 21 percent;
Whereas bicycle commuters annually save on average $1,825 in auto-related costs, reduce their carbon emissions by 128 pounds, conserve 145 gallons of gasoline, and avoid 50 hours of gridlock traffic;
Whereas the greatest potential for increased bicycle usage is in our major urban areas where 40 percent of trips are 2 miles or less and 28 percent are less than one mile;
Whereas in 1969 approximately 50 percent of children in the United States got to school by walking or bicycling, but in 2001 only 15 percent of students were walking or bicycling to school;
Whereas as much as 20 to 30 percent of morning traffic is often generated by parents driving their children to schools, and in the United States, motor vehicle crashes are the leading cause of death for children ages 3 to 14;
Whereas many public agencies in cities are using bicycles to deliver critical municipal services, for example, more than 80 percent of police departments serving populations of 50,000 to 249,999 and 96 percent of those serving more than 250,000 residents now have routine patrols by bicycle;
Whereas surveys show that a majority of people want to ride and walk more but are dissuaded by concern over traffic danger and other barriers, and case studies have shown that when those barriers to bicycling are removed, people start riding;
Whereas investment used for improvements for bicyclists and promoting bicycle use resulted in the quadrupling of bicycle use in Portland, Oregon, since 1994 and a recent report to Congress on the nonmotorized transportation pilot program reveals that 19.6 percent of trips in Minneapolis, Minnesota, are made by biking and walking, reflecting the benefit of initial investments in nonmotorized infrastructure;
Whereas the American bicyclist generates enormous economic returns, in 2006, the national bicycling economy contributed $133 billion to the United States economy, supported nearly 1.1 million jobs across the United States, generated $17.7 billion in annual Federal and State tax revenue, produced $53.1 billion annually in retail sales and services, and provided sustainable growth in rural communities;
Whereas a national network of interconnected urban and rural bikeways can provide valuable community benefits, including low or no-cost recreation and alternative transportation options for people of all ages and abilities;