Miss. Code § 63-3-205
The provisions of this chapter applicable to the drivers of vehicles upon the highways shall apply to the drivers of all vehicles owned or operated by the United States, this state or any county, city, town, district, or any other political subdivision of the state, subject to such specific exceptions as are set forth in this chapter with respect to authorized emergency vehicles.
The provisions of this chapter shall not apply to persons, teams, motor vehicles and other equipment while actually engaged in work upon the surface of a highway but shall apply to such persons and vehicles when traveling to or from such work.
No driver of any authorized emergency vehicle shall assume any special privilege under this chapter except when such vehicle is operated in response to an emergency call or in the immediate pursuit of an actual or suspected violator of the law.
Miss. Code § 63-3-205