Alaska Oversize / Overweight Permit Requirements
Legal-without-permit dimension limits, escort and pilot car thresholds, height pole rules, daylight-only windows, and holiday restrictions for Alaska oversize moves.
Legal limits without a permit
In Alaska, 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 Alaska. Thresholds are conservative — your specific permit conditions may impose tighter limits depending on the route.
| Trigger | Dimension | Threshold | Detail |
|---|---|---|---|
| Rear pilot car | Width | 18'0" | Second (rear) pilot car required when width exceeds 18'. Lead+chase both required; lower thresholds may apply on rural 2-lane (17 AAC 25.015). |
| Height pole | Height | 14'6" | Height-clearance pole required on front pilot car for loads taller than 14'6" (17 AAC 25.020). |
| Front pilot car | Width | 14'0" | Front pilot car required for loads over 14' wide on state highways. Specific route thresholds vary — confirm in permit conditions (17 AAC 25.015). |
| Daylight-only movement | Width | 14'0" | Overwide loads restricted to daylight movement on most state highways. Night endorsement rare; confirm with DOT district office (17 AAC 25.015). |
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. Single-source or pending re-verify — confirm with the permit office.