Hawaii Oversize / Overweight Permit Requirements
Legal-without-permit dimension limits, escort and pilot car thresholds, height pole rules, daylight-only windows, and holiday restrictions for Hawaii oversize moves.
Legal limits without a permit
In Hawaii, 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 | 65′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 Hawaii. Thresholds are conservative — your specific permit conditions may impose tighter limits depending on the route.
| Trigger | Dimension | Threshold | Detail |
|---|---|---|---|
| Front pilot car | Length | 100'0" | Escort required for combinations over 100' overall length on state highways (HRS §291C-133). |
| Rear pilot car | Width | 18'0" | Second (rear) pilot car required when width exceeds 18' on state highways. Lead+chase both required (HAR §19-120.1). |
| Front pilot car | Width | 16'0" | Front pilot car required for widths over 16' on state highways (HAR §19-120.1). County roads may have lower thresholds — verify with county DPW. |
| Height pole | Height | 15'0" | Lead pilot must carry height-clearance pole for loads over 15' tall on state highways (HAR §19-120.5). |
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.