In Mississippi, any load that exceeds the legal size or weight limits requires an oversize/overweight permit before it moves. Below are the legal limits and the requirements that apply at each threshold.
1When you need a permit
A load is oversize or overweight once it passes any of these:
| Dimension | Mississippi legal limit | Permit if over |
|---|---|---|
| Width | 8 ft 6 in | Wider |
| Height | 13 ft 6 in | Taller |
| Length (combination) | 99 ft | Longer |
| Gross weight | 80,000 lbs | Heavier |
| Single axle | 20,000 lbs | Heavier |
| Tandem axle | 34,000 lbs | Heavier |
2Escort & pilot car requirements
| Once the load is over… | Mississippi requires |
|---|---|
| 13 ft wide | 1 escort (pilot car) |
| 15 ft 7 in high | Escort with a height pole / pole car |
| 99 ft long | 1 escort · 160 ft → 2 escorts |
| 15 ft 7 in high or 17 ft wide | Route survey required |
| 20 ft wide | Police escort |
3When you can travel
- Daylight only — <=12 ft wide: sunrise to sunset; >12 ft wide: 30 min after sunrise to 30 min before sunset (per National Weather Service).
- Weekend travel allowed within dimensional limits.
- Loads <=12 ft wide, <=13'6" high, <=99 ft long, <=150,000 lbs may travel at night with proper lighting/escorts.
- Holiday blackouts: New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day.
4Superloads in Mississippi
A load is a superload once it exceeds any of these:
| Superload trigger | Threshold |
|---|---|
| Width | 17 ft |
| Height | 15 ft 7 in |
| Length | 121 ft |
| Gross weight | 189,999 lbs |
5Permit timing
- Validity: a single-trip permit is good for ~3 days.
Get the full cost of your load
FreightDeck estimates every cost on an oversize move — permits, escorts, police, route survey, engineering, and the truck rate — for your exact load and route, across all 48 states and Canada, up to superload size.
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?Mississippi permit FAQ
When do I need an oversize permit in Mississippi?
Once a load exceeds any legal limit: 8 ft 6 in wide, 13 ft 6 in high, 99 ft long (combination), or 80,000 lbs gross.
When do I need a pilot car in Mississippi?
Mississippi requires one escort over 13 ft wide, a height pole over 15 ft 7 in high, and a police escort over 20 ft wide.
Can you drive an oversize load at night in Mississippi?
Daylight only, up to 12 ft wide: sunrise to sunset; over 12 ft wide: 30 min after sunrise to 30 min before sunset (per National Weather Service). Loads up to 12 ft wide, up to 13'6″ high, up to 99 ft long, up to 150,000 lbs may travel at night with proper lighting/escorts. Weekend travel is allowed within limits.
What counts as a superload in Mississippi?
Over 17 ft wide, 15 ft 7 in high, 121 ft long, or 189,999 lbs gross.
How much does a Mississippi oversize permit cost?
The state permit fee depends on the load's size and weight. The full cost of a move also includes escorts, police, route surveys, engineering, and the truck rate, which vary by route. FreightDeck estimates all of it for your exact load — price your Mississippi load with FreightDeck →.
Can oversize loads move on weekends and holidays in Mississippi?
Weekend travel is allowed within the same dimensional limits. Movement stops on New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day (No movement after 12:00 noon on the day preceding, and on the holiday, unless permitted); check the permit conditions for exact times.
Does Mississippi require a route survey?
Yes, once a load is over 15 ft 7 in high or 17 ft wide. The survey checks every bridge, sign, signal and wire on the route and is filed with the permit; it usually takes longer than the permit itself, so start it first. What a route survey involves →
Are any loads exempt from oversize permits in Mississippi?
Mississippi publishes exemptions or relaxed rules for farm equipment, and forest products (for example non-interstate, farm operations). Exemptions are narrow and usually limited to specific roads and daylight hours; anything else over the legal limits needs a permit.
Does a Mississippi permit cover Tennessee?
No. Every state issues its own permit, and a move crossing into Tennessee, Alabama, or Louisiana needs a separate permit there with that state's escort and travel rules. FreightDeck prices every state on the route in one quote.