United States Government Publishing Office publisher pbl distributor dst United States Government Accountability Office Resources, Community, and Economic Development Division author aut Government Organization text government publication eng GAOREPORTS Legislative Agency Publications gao legislative 2010-08-12 U.S. Government Printing Office 1997-06-05 monographic deposited born digital 12 p. GA 1.13:RCED-97-159 https://www.govinfo.gov/app/details/GAOREPORTS-RCED-97-159 P0b002ee18037a67a f:rc97159 DGPO 2010-08-12 2011-03-28 GAOREPORTS-RCED-97-159 machine generated eng fdlp REPORT GAOREPORTS-RCED-97-159 RCED-97-159 Federal aid for highways Computer modeling Quality assurance Future budget projections Data integrity Appropriation acts Computer software verification and validation Letter Report RCED Pursuant to a congressional request, GAO reviewed the Federal Highway Administration's (FHwA) funding apportionment model.<p/>GAO noted that: (1) FHwA's new apportionment model matches the highway funding formula contained in the governing legislation; (2) the model captures the structure of the overall apportionment process, accurately representing the interrelationships among programs and equity categories and how each builds on the other; (3) the model is internally consistent to the extent that the various parts of it work well together and that the operation of one part does not adversely affect another part; (4) furthermore, the model is adaptable to reflect the provisions of new highway funding proposals; (5) however, the model is complex because of the complexity of current law, and this complexity does not lend itself to the widespread use of the model by staff not trained in its structure and programming language; (6) furthermore, as with any model, the precision of its estimates will depend on the accuracy of the data and subroutines that are used for alternative legislative proposals; and (7) however, GAO found that the FHwA office responsible for overseeing the model does not verify new input data, nor does it have staff with the technical expertise to verify the accuracy of new subroutines developed by the contractor. https://www.govinfo.gov/content/pkg/GAOREPORTS-RCED-97-159/html/GAOREPORTS-RCED-97-159.htm https://www.govinfo.gov/content/pkg/GAOREPORTS-RCED-97-159/pdf/GAOREPORTS-RCED-97-159.pdf GAO/RCED-97-159 https://www.govinfo.gov/app/details/GAOREPORTS-RCED-97-159 Letter Report GAO/RCED-97-159; Highway Funding: The Federal Highway Administration's Funding Apportionment Model; Federal aid for highways Computer modeling Quality assurance Future budget projections Data integrity Appropriation acts Computer software verification and validation