Mississippi Oversize / Overweight Permit Requirements
Legal-without-permit dimension limits, escort and pilot car thresholds, height pole rules, daylight-only windows, and holiday restrictions for Mississippi oversize moves.
Legal limits without a permit
In Mississippi, you can move a load without an OSOW permit up to these dimensions on the Interstate and designated highways. Anything over the limits requires a permit (and may require escorts — see below).
| Dimension | Without a permit | Permit required when |
|---|---|---|
| Width | 8′6″ (federal limit) | Anything wider |
| Height | 13′6″ | Anything taller |
| Combo length | 75′0″ | Anything longer |
| Gross weight | 80,000 lb | Anything heavier |
Escort and pilot car thresholds
When permitted, the following escort or movement-restriction rules apply in Mississippi. Thresholds are conservative — your specific permit conditions may impose tighter limits depending on the route.
| Trigger | Dimension | Threshold | Detail |
|---|---|---|---|
| Front pilot car | Length | 120 ft | Length over 120 ft: 1 front + 1 rear escort required. |
| Rear pilot car | Length | 120 ft | Length over 120 ft: 1 front + 1 rear escort required. |
| Rear pilot car | Length | 99 ft | Length over 99 ft (up to 120 ft): 1 rear escort required. |
| Front pilot car | Width | 16 ft | Width over 16 ft: 1 front + 1 rear civilian escort required. |
| Rear pilot car | Width | 16 ft | Width over 16 ft: 1 front + 1 rear civilian escort required. |
| 1 pilot car (front or rear) | Front overhang | 15 ft | Front projection 15 ft or greater: 1 front and/or 1 rear escort required per permit conditions. |
| 1 pilot car (front or rear) | Rear overhang | 15 ft | Rear overhang 15 ft or greater: 1 front and/or 1 rear escort required per permit conditions. |
| Rear pilot car | Width | 13 ft | Width over 13 ft (up to 16 ft): 1 rear escort required. |
| Daylight-only movement | Width | 8'6" | Travel restricted Mon–Sat 1/2 hr after sunrise to 1/2 hr before sunset. No Sunday travel. |
| Weekend / holiday restriction | Width | 8'6" | No Sunday travel. No travel after noon preceding New Year's, Memorial Day, July 4, Labor Day, Thanksgiving, or Christmas. |
Stop tracking these rules by hand.
OverSizeTMS encodes the per-state escort and dimension rules for every state plus DC. Enter the load dimensions and route, and the platform tells you which permits, escorts, and time windows apply automatically.
See how it works →Last updated 2026-06-06. Cross-checked against the state admin code.