Miss. Code Ann. § 65-7-25: Miss. Code Ann. § 65-7-25

The boards of supervisors of the several counties of this state are required, within sixty days after receipt of a petition signed by twenty-five or more regular travelers of any public highway within their respective county, to have prepared and properly posted along said highway certain sign or signal boards at such intervals as may be deemed necessary to avoid danger for speedy travel, not exceeding four to the mile, with such inscriptions written thereon as will sufficiently warn the traveling public of the danger zones thereon.