The county board of Dakota County may appropriate from its road and bridge fund to any town, statutory city, or home rule charter city of the second, third, or fourth class in the county such sums of money as are available and which it deems advisable to aid such towns, statutory cities, or home rule charter cities of the second, third, or fourth class in the construction and maintenance of roads, streets, or bridges therein, and such appropriations may be directly expended by the county board upon such roads, streets, or bridges as shall be designated by the governing bodies of such towns, statutory cities, or home rule charter cities of the second, third, or fourth classes. The county board shall determine the amount to be appropriated to such town, statutory city, or home rule charter city of the second, third, or fourth class, notwithstanding any limitation to the contrary.