Section 605 ILCS 5/5-701.7(a) Any county board with the approval of the Department may also use motor fuel tax funds allotted to it to pay the county's share of the cost of projects on the federal aid urban and the federal aid secondary highway systems in the county constructed under the provisions of the Federal Aid Road Act. The county board is authorized to cooperate with the Department in selecting these systems of federal aid highways to be improved.(b) Any county board with the approval of the Department may also use motor fuel tax funds allotted to it to pay the county's share of any project constructed under Section 3-104.3 of this Code.(c) Any county board, with the approval of the Department, may also use motor fuel tax funds allotted to it, matching tax funds, or any other funds of the county for highways to pay the county's proportionate share of any federally eligible transportation project on, adjacent to, or intended to serve county highways in the county. P.A. 91-315, eff. 1/1/2000.