605 ILCS 5/6-511

The highway commissioner of any road district may turn over to any municipality lying wholly within its limits, money from the regular road taxes, to be used by such municipality within its corporate limits in the construction, including the separation of grades, of State or county highways and municipal streets as provided for in Division 2 of Article 7 of this Code, provided the consent of the Department is first obtained before such money can be turned over to municipalities by such highway commissioner.