When enough tolls have been collected, after payment of the cost of collection and maintenance, to fully retire the bonds, the bridge or tunnel shall be free of all toll charges and become a part of the primary system of state roads.
KRS 181.050
Recodified 1942 Ky. Acts ch. 208, sec. 1, effective10/1/1942, from Ky. Stat. sec. 938p-4.