(a) The department may advance the federal share of each urban system project on a county road or a city street from the money appropriated by the Legislature and allocated by the commission in conformance with the requirements of this chapter.
(b) Expenditures of federal urban system funds, or federal general funds substituted therefor, shall be exempt from the provisions of Sections 188 and 188.8.
(c) Counties and cities may use any funds available to them to match funds made available to them, if the use of funds for such matching purposes is not prohibited by federal law or regulations.