Okla. Stat. tit. 21, § 1253

Every person in charge, as engineer of a locomotive engine, who omits to cause a bell to ring or a steam whistle to sound at the distance of at least eighty (80) rods from the place where the track crosses, on the same level, any traveled public way, is punishable by a fine not exceeding Fifty Dollars ($50.00), or by imprisonment in the county jail not exceeding sixty (60) days.