The contents are presented in five sections, followed by an Authorization Table indicating the amounts, in millions of dollars, allocated to the different programs. The first section, Investing in Our Future, discusses funding level, highway funding equity, the Highway Trust Fund, and other revenue provisions. The next section, Improving Safety, discusses funding for driver and vehicle safety programs, infrastructure safety, motor carrier safety, recreational boating safety, and one-call notification (to reduce unintentional damage to underground facilities). The third section, Rebuilding America's Infrastructure, discusses TEA-21 provisions for Disadvantaged Business Enterprises, highway construction programs, transit programs, rail programs, and special programs such as Welfare to Work, the Appalachian Development Highway System, Ferry Boats, National Historic Covered Bridge Preservation, and the Woodrow Wilson Memorial Bridge. The fourth section, Protecting Our Environment, discusses TEA-21 provisions for congestion mitigation and air quality improvement, transportation enhancements, bicycle transportation and pedestrian walkways, the recreational trails program, the National Scenic Byways Program, the Transportation and Community and System Preservation Pilot, planning, streamlining, and ozone and particulate matter standards. The final section, Advancing Research and Technology, addresses TEA-21 provisions for research and technology and Intelligent Transportation Systems.