Maine Oversize / Overweight Permit Requirements
Legal-without-permit dimension limits, escort and pilot car thresholds, height pole rules, daylight-only windows, and holiday restrictions for Maine oversize moves.
Legal limits without a permit
In Maine, 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 Maine. Thresholds are conservative — your specific permit conditions may impose tighter limits depending on the route.
| Trigger | Dimension | Threshold | Detail |
|---|---|---|---|
| Police escort | Length | 150'0" | Length 150' or greater: 2 state police escorts required. |
| Police escort | Length | 125'0" | Length 125' or greater (under 150'): 1 civilian pilot + 1 state police escort required. |
| Front pilot car | Length | 125'0" | Length 125' or greater (under 150'): 1 civilian pilot + 1 state police required. |
| 1 pilot car (front or rear) | Length | 80'0" | Length over 80' (under 125'): 1 civilian pilot car required. |
| Police escort | Width | 20'0" | Width 20' or greater: 2 state police escorts required (no civilian pilots). |
| Police escort | Width | 16'0" | Width 16' or greater (under 20'): 1 civilian pilot + 1 state police escort required. |
| Front pilot car | Width | 16'0" | Width 16' or greater (under 20'): 1 civilian pilot + 1 state police required. |
| Height pole | Height | 16'0" | Height over 16': 1 pilot car with height pole required. |
| 1 pilot car (front or rear) | Width | 12'0" | Width over 12' (under 16'): 1 civilian pilot car required. |
| Daylight-only movement | Width | 12'0" | Travel permitted 1/2 hr before sunrise to 1/2 hr after sunset only. |
| Weekend / holiday restriction | Width | 12'0" | No travel on state holidays; July–August Sat/Sun restricted for loads 12' or wider or 80' or longer. |
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.