Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-7-19

(2) Any vehicle operated by a United States rural mail carrier for the purpose of delivering United States mail may be marked with two (2) amber-colored lights on front top of the vehicle and two (2) red-colored lights on rear top of the vehicle and alternatively or additionally may be marked with a white, flashing strobe light on the roof of the vehicle so as to warn approaching travelers to decrease their speed because of danger of colliding with the mail carrier as he stops and starts along the edge of the road, street or highway.

(3) Any sanitation vehicle operated by a county, municipality or other political subdivision of this state or by a contractor under contract with a county, municipality or other political subdivision of this state to collect solid waste, refuse or recyclable material may be marked with flashing or oscillating white- or amber-colored lights so as to warn approaching travelers to decrease speed because of the danger of colliding with the sanitation collection vehicle as it stops and starts along the road, street or highway.

(4) Any nonlaw enforcement vehicle being used to lead and facilitate the movement of a military funeral procession may be marked with blinking, rotating or oscillating purple lights. “Military funeral procession” means two (2) or more vehicles accompanying the body of a deceased member of the United States Armed Forces, or traveling to the church, chapel or other location at which the funeral service or entombment is to be held.

(5) Any operator of an emergency vehicle authorized to be marked with blinking, rotating or oscillating lights in accordance with this section, shall use blinking, rotating or oscillating lights when operating the emergency vehicle at a speed in excess of thirty (30) miles per hour over the posted speed limit.