§ 342-dd. Portion of the state highway system to be designated as the "Turning Point Trail". All that portion of the state highway system beginning at the intersection of route four and the eastern boundary of the village of Whitehall, in the county of Washington, continuing west on route four to the intersection of route four and route twenty-two in the village of Whitehall, then continuing south on route four, and terminating at the intersection of route four and the northern boundary of the city of Mechanicville, in the county of Saratoga shall be designated and known as the "Turning Point Trail".