Section 4. Any highway constructed jointly, under the provisions of this supplement, shall be repaired and maintained at the expense of the proper county; but nothing shall prevent the proper authorities of a borough, township, or incorporated town from entering into a contract or contracts with the county commissioners of the proper county for the maintenance of said improved highway, under such terms and conditions as may be mutually satisfactory.
Compiler's Note: Section 1501 of Act 447 of 1929 provided
that section 4 is repealed insofar as it confers powers
or imposes any duties on counties other than counties of
the first class.