During the last 10 years, much of the financial burden for surface transportation projects has been on state and local governments. In 2003, approximately $143 billion in revenues from federal, state and local sources were used for surface transportation projects.1 In 2005, it was estimated that approximately $180 billion in revenues would be available for surface transportation needs.2 The majority of these funds, however, come from state sources. The federal share for highway improvements during the last decade averaged approximately 42 percent; the federal share for public transportation during the same period averaged 47 percent.3