That whenever any person, persons or corporations shall fence and enclose extensive tracts of land of one hundred acres or over in extent for grazing purposes in the counties of Barber, Pratt, and Russell, and all counties west of range 15, west of the sixth principal meridian, in the state of Kansas, such person, persons or corporation shall provide a suitable swinging or lifting gate, constructed in such manner that it may be easily opened or closed, whenever said fence or enclosure crosses any road established by custom and usage but not a legally established public highway. Said gate shall be so constructed as to meet conveniently the requirements of the traveling public; and in addition to said gate, shall set posts on each side of said gate, at suitable distances therefrom, and of not less than four inches in diameter and not less than seven feet in length, set not less than thirty inches in the ground, and for the purpose of tying any horse or team thereto, while any traveler is engaged in opening or closing said gate.