http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a critical review of assumptions and unit costs and recommended updating procedures
Economics of highway design alternatives
State Department of Highways and Public Transportation.
by Jesse L. Buffington, William F. McFarland, John B. Rollins.
Research study number 2-8-77-225, "Economics of highway design alternatives," sponsored by the State Department of Highways and Public Transportation in cooperation with the Federal Highway Administration, and the United States Department of Transportation.
Texas Highway Economic Evaluation Model.