Michigan Compiled Laws, Chapter 247. Highways § 247.662b

Sec. 12b. (1) The amounts returned to the counties for the county urban system as provided in section 12(4)  1 shall be distributed on the basis of the county road mileage contained within the urban area boundaries as established pursuant to this section.

(2) On January 3, 1973, the department of transportation shall establish urban area boundaries which shall be reviewed and corrected periodically and which shall be in conformance with the federal-aid urban area definition as published by the federal highway administration of the United States department of transportation and in effect July 1, 1971.

(3) The amounts returned to the county road commissions qualifying under this section shall be in the same proportion that the total urban local road mileage, plus 6 times the urban primary road mileage of each county bears to the total mileage in all the urban local road systems of the state, plus 6 times the total mileage in all the urban primary road systems of the state.

(4) All amounts returned to the county road commissions on the basis of the urban primary road mileage of each county are for use on the county primary road system and are subject to the same provisions of this act as other amounts for expenditure on the county primary road system.

(5) All amounts returned to the county road commissions on the basis of the urban local road mileage of each county are for expenditure on the county local road system and are subject to the same provisions of this act as other amounts for expenditure on the county local road systems.