United States Government Publishing Office publisher pbl distributor dst United States Government Accountability Office author aut Government Organization text government publication eng GAOREPORTS Legislative Agency Publications gao legislative 2010-08-12 U.S. Government Printing Office 2002-05-31 monographic deposited born digital GA 1.13:GAO-02-571 https://www.govinfo.gov/app/details/GAOREPORTS-GAO-02-571 P0b002ee180385bb5 f:d02571 DGPO 2010-08-12 2011-03-28 GAOREPORTS-GAO-02-571 machine generated eng fdlp REPORT GAOREPORTS-GAO-02-571 GAO-02-571 Federal aid for highways Highway engineering Highway planning Public roads or highways Highway safety Federal/state relations Funds management FHWA Interstate Maintenance Program Interstate Highway System National Highway System FHWA Highway Bridge Replacement and Rehabilitation Program Other Written Product A03479 Federal spending on Interstate highways has contributed to changes in residential and business land-use patterns. In 1991, GAO raised concerns about the condition of Interstate highways and rising levels of congestion. The original purposes for the Interstate system were to provide for efficient long-distance travel, support defense, and connect metropolitan and industrial areas. Today, the most important role that the Interstates perform, other than supporting safe travel, is moving freight traffic across their states. The federal government provides funding for. and oversight of, the Interstate system while the states do most of the maintaining and planning for the future of the system. Combined federal and state spending on the Interstate System increased from $13.0 billion in 1992 to 16.2 billion in 2000. States are required to pay ten percent of the cost of an Interstate project; however, GAO found that the average nonfederal share of urban Interstate projects was 15 percent and 11 percent for rural projects. Interstate highways are in better physical condition and are safer than other classes of roads, although they are generally more congested. The states expect that increased traffic, the aging of the infrastructure, and funding constraints will affect their ability to maintain physical and safety conditions of the Interstate Systems and to alleviate congestion, but the costs to address the factors pressuring their Interstates were difficult to determine. https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-02-571/html/GAOREPORTS-GAO-02-571.htm GAO-02-571 https://www.govinfo.gov/app/details/GAOREPORTS-GAO-02-571 Other Written Product GAO-02-571; Highway Infrastructure: Interstate Physical Conditions Have Improved, but Congestion and Other Pressures Continue; Federal aid for highways Highway engineering Highway planning Public roads or highways Highway safety Federal/state relations Funds management FHWA Interstate Maintenance Program Interstate Highway System National Highway System FHWA Highway Bridge Replacement and Rehabilitation Program