Miss. Code Ann. § 65-3-99: Miss. Code Ann. § 65-3-99

Whenever, by legislation, any highway, street or road under the jurisdiction of a county, municipality or other political subdivision of the state is placed on the designated state highway system under the jurisdiction of the Mississippi Transportation Commission, such highway, street or road shall become a state highway but, unless otherwise specifically provided by law, shall remain under the jurisdiction of the county, municipality or other political subdivision for construction and maintenance purposes until brought up to applicable construction standards as required by the commission and the Department of Transportation.