Who can legally use blue lights and sirens to escort an oversize truck load on a Mississippi state highway?

Plain-English summary

Lee County Sheriff Jim Johnson asked who is legally allowed to flash blue lights and run sirens while escorting an oversize truck load on a Mississippi state highway. The Attorney General's answer is a two-part rule.

First, blue lights themselves are tightly restricted in Mississippi. Section 63-7-19 limits blinking, oscillating, or rotating blue lights to police vehicles being used for emergency work, and Section 63-7-20(1) makes it unlawful for anyone other than an on-duty law enforcement officer to display them. That is a hard rule with no carve-out for private pilot cars.

Second, the AG's office found no statute that specifically governs escorts for ordinary "oversize" loads. But for "superload" vehicles, which are the largest of the oversize category, Section 63-5-49(6) authorizes an individual meeting its requirements to escort in a marked law enforcement vehicle with operating blue lights. The opinion notes the AG cannot decide as a matter of fact whether any specific person fits the listed descriptions; that determination belongs to the agency or the court.

The original request also asked about a constable escorting oversize loads outside the constable's elected county. The AG declined to answer that question as outside the present requester's office. For information, it quoted a 2003 opinion, Ringer, saying a constable has no authority to act officially outside the county of election.

What this means for you

Sheriffs and law enforcement chiefs

The opinion holds that under Section 63-7-19 only police vehicles used for emergency work may display blinking, oscillating, or rotating blue lights, and under Section 63-7-20(1) it is unlawful for anyone other than an on-duty law enforcement officer to display them. For superloads specifically, Section 63-5-49(6) provides that a police officer, a Department of Public Safety law enforcement officer, or an authorized MDOT enforcement officer is authorized to escort in a marked law enforcement vehicle with operating blue lights. The opinion adds that whether a given individual fits the listed descriptions is a fact question it cannot answer.

Trucking companies and shippers moving oversize freight

Under the opinion, Mississippi law does not address escorting ordinary oversize loads beyond the blue-light statutes. Section 63-5-49(6) addresses superload escorts by authorizing an individual who meets its requirements to escort in a marked law-enforcement vehicle with operating blue lights. The opinion refers further oversize-escort questions to MDOT.

Pilot-car and private escort operators

The opinion's rule is that a private vehicle cannot lawfully display blue lights: Section 63-7-20(1) makes display by anyone other than an on-duty law enforcement officer unlawful. For a superload, the opinion says that any individual meeting the requirements of Section 63-5-49(6) may escort in a marked law-enforcement vehicle with operating blue lights.

Constables

For informational purposes, the opinion cites its 2003 Ringer opinion that "there is no authority for a constable to act in his official capacity outside the county from which he is elected." It declines to answer the cross-county constable question as a present question.

Common questions

Q: Are blue lights ever legal on a private vehicle in Mississippi?
A: No. Section 63-7-20(1) makes it unlawful for any person other than a law enforcement officer on duty to use or display blue lights as described in Section 63-7-19. Display alone (not just operation) is enough to violate the statute.

Q: Does the opinion define oversize and superload size thresholds?
A: No. It says superload vehicles are larger than oversize load vehicles but gives no dimensions or weight limits. The AG says it cannot interpret agency rules or manuals and recommends contacting MDOT for further oversize-escort questions.

Q: Does the AG say private pilot cars can never escort oversize loads?
A: The AG addresses blue-light use and the statute governing superload escorts. It says Mississippi law does not otherwise address escorting oversize loads and directs further questions to MDOT. The opinion does not decide every possible role for a private escort vehicle.

Q: Who counts as an "authorized enforcement officer of MDOT" for superload escort?
A: The AG says whether a particular person meets one of Section 63-5-49(6)'s listed officer categories is a factual question outside its opinion authority. It does not assess any individual MDOT employee's status.

Q: I am a constable. Can I escort superloads through neighboring counties?
A: The AG does not answer the constable question. For informational purposes, it cites Ringer's statement that a constable has no official authority outside the county of election, but reaches no conclusion about the proposed escort.

Background and statutory framework

Section 63-7-19 says only police vehicles used for emergency work may be marked with blinking, oscillating, or rotating blue lights to warn other vehicles to yield. Section 63-7-20(1) bars anyone other than an on-duty law enforcement officer from using or displaying those lights on a motor vehicle as provided in Section 63-7-19.

The AG says Mississippi law does not otherwise address escorting oversize loads. It declines to interpret agency rules, regulations, or manuals and refers further questions to MDOT.

For superloads, Section 63-5-49(6) provides that a police officer, a Department of Public Safety law enforcement officer, or an authorized enforcement officer of the Mississippi Department of Transportation is authorized to escort in a marked law enforcement vehicle with operating blue lights. The AG concludes that any individual meeting the section's requirements may escort and says whether a particular person qualifies is a factual determination it cannot make.

The AG cites Ringer's statement on a constable's authority outside the county of election for informational purposes only. It does not answer the constable escort question in this opinion.

Citations and references

Statutes:

• Miss. Code Ann. § 63-7-19 (blue lights restricted to police vehicles)
• Miss. Code Ann. § 63-7-20(1) (unlawful for non-officer to use blue lights)
• Miss. Code Ann. § 63-5-49 (superload escort)
• Miss. Code Ann. § 7-5-25 (AG opinion authority limited to prospective state-law questions)

Prior AG opinions referenced:

• MS AG Op., Ringer (Feb. 21, 2003) (constable's authority confined to county of election)

Source

• Landing page: https://attorneygenerallynnfitch.com/divisions/opinions-and-policy/recent-opinions/
• Original PDF: https://attorneygenerallynnfitch.com/wp-content/uploads/2026/03/J.-Johnson-March-18-2026-Use-of-Blue-Lights-for-Oversize-Load.pdf

Original opinion text

March 18, 2026

The Honorable Jim H. Johnson
Sheriff, Lee County
510 Commerce Street
Tupelo, Mississippi 38804

Re: Use of Blue Lights for Oversize Load

Dear Sheriff Johnson:

The Office of the Attorney General has received your request for an official opinion.

Question Presented

Who may use blue lights and sirens to escort an oversize load traveling on a state highway?

Brief Response

Generally, "[o]nly police vehicles used for emergency work may be marked with blinking, oscillating or rotating blue lights to warn other vehicles to yield the right-of-way." Miss. Code Ann. § 63-7-19. However, any individual meeting the requirements of Mississippi Code Annotated Section 63-5-49(6) may escort a superload vehicle.

Applicable Law and Discussion

To begin, pursuant to Section 7-5-25, official opinions of the Attorney General are limited to prospective questions of state law only. We can neither validate nor invalidate past action, and we are unable to interpret or opine upon agency rules, regulations, or manuals. Miss. Code Ann. § 7-5-25. Additionally, questions must relate to the requestor's respective office. Id. We note that your initial request regarded a constable's jurisdiction to escort oversized loads outside of their elected county. For informational purposes, we refer you to MS AG Op., Ringer (Feb. 21, 2003), providing that "there is no authority for a constable to act in his official capacity outside the county from which he is elected."

You ask who may use blue lights and sirens to escort an oversize load traveling on a state highway. Generally, "[o]nly police vehicles used for emergency work may be marked with blinking, oscillating or rotating blue lights to warn other vehicles to yield the right-of-way." Miss. Code Ann. § 63-7-19. Additionally, "[i]t is unlawful for any person, other than a law enforcement officer on duty, to use or display blue lights on a motor vehicle as provided for in Section 63-7-19." Miss. Code Ann. § 63-7-20(1).

Beyond this, Mississippi law does not address escorting oversize loads. However, Section 63-5-49(6) addresses escorting superload vehicles, which are larger than oversize load vehicles, and provides:

> Any police officer, law enforcement officer of the Department of Public Safety or authorized enforcement officer of the Mississippi Department of Transportation shall be authorized to escort any vehicle designated as a superload vehicle pursuant to the regulations of the Mississippi Department of Transportation. The escort shall be performed in a marked law enforcement vehicle with operating blue lights.

Accordingly, it is the opinion of this office that any individual meeting the requirements of Section 63-5-49(6) may escort a superload vehicle. Whether an individual is a "police officer, law enforcement officer of the Department of Public Safety or authorized enforcement officer of the Mississippi Department of Public Transportation" is a determination of fact that cannot be made by this office. See Miss. Code Ann. § 7-5-25.

For additional questions regarding the escort of oversize loads, we recommend contacting the Mississippi Department of Transportation.

If this office may be of any further assistance to you, please do not hesitate to contact us.

Sincerely,

LYNN FITCH, ATTORNEY GENERAL

By: /s/ Maggie Kate Bobo
Maggie Kate Bobo
Special Assistant Attorney General