It is declared to be the purpose of the general assembly in the passage of section 43-1-225 that the state of Colorado may more fully avail itself of the benefits of funds apportioned for expenditure on federal-aid primary or secondary systems and on the interstate system, including extensions thereof within urban areas, in conformance with the "Federal-Aid Road Act", approved July 11, 1916, and all acts of the congress amendatory thereof and supplementary thereto.