1. Notwithstanding the provisions of section 137.555, any county of the second class which now has or may hereafter have more than one hundred thousand inhabitants, and any county of the first class not having a charter form of government, shall expend not less than twenty-five percent of the moneys accruing to it from the county’s special road and bridge tax levied upon property situated within the limits of any city, town or village within the county for the repair and improvement of existing roads, streets and bridges within the city, town or village from which such moneys accrued, except that any county of the first classification with more than sixty-five thousand but fewer than seventy-five thousand inhabitants and with a county seat with more than fifteen thousand but fewer than seventeen thousand inhabitants shall not be required to expend such moneys as prescribed in this section.

2. The city council or other governing body of the city, town or village shall designate the roads, streets and bridges to be repaired and improved and shall specify the kinds and types of materials to be used.

3. The county commission may make and supervise the improvements or the city, town or village, with the consent and approval of the county commission, may provide for the repairs and improvement by private contract and, in either case, the county commission shall pay the costs thereof out of any funds available under the provisions of this section.