Legal size limits without a permit
| Measurement | Hawaii legal limit |
|---|---|
| Height | 14 ft |
| Width | 9 ft |
| Front Overhang | Confirmed at filing |
| Rear Overhang | Confirmed at filing |
Axle and gross weights
How much each axle group and the whole vehicle can carry in Hawaii, without a permit and with an overweight permit.
| Axle group | Legal limit | With a permit |
|---|---|---|
| Steer axle | Confirmed at filing | Confirmed at filing |
| Single axle | 20,000 lbs | UNCONFIRMED — no published fixed statewide ceiling found |
| Tandem axle | 34,000 lbs | UNCONFIRMED — no published fixed statewide ceiling found |
| Tridem axle | Confirmed at filing | Confirmed at filing |
| Quad axle | Confirmed at filing | Confirmed at filing |
| Gross weight | 80,000 lbs | Set per permit by the state |
Superload: Reviewed case by case
Permit types we file in Hawaii
Single-Trip PermitOne-time movement authorization on state highways.
Continuous-Trip / Annual PermitRepeated or ongoing movement authorization for a given vehicle.
Oversize, Overweight, or Combined PermitIssued separately or combined depending on which limits are exceeded.
Maximum dimensions with a permit
| Dimension | Maximum with a permit |
|---|---|
| Length | Confirmed at filing |
| Width | Confirmed at filing |
| Height | Confirmed at filing |
| Rear Overhang | Confirmed at filing |
Hawaii's island-based permit offices (Oahu, Maui, Hawaii Island, Kauai) review oversize/overweight and superload-scale loads case by case rather than publishing fixed dimension/weight ceilings.
Escorts and travel restrictions
Escort & pilot car rules
- Application form includes checkboxes for 'Police Escort' and 'Private Escort,' indicating escorts may be required.
- Specific dimensional escort-trigger thresholds are not published (UNCONFIRMED).
When you can travel
- Permitted movement windows are typically restricted to specific hours depending on permit conditions.
- No movement Saturday, Sunday, or holidays under standard permit conditions.
- Permits are valid on state highways only — separate approval required from county/city authorities for local roads.
Signs, flags and lights
Most states require
- An “OVERSIZE LOAD” banner on the front of the truck and the rear of the load.
- Red or fluorescent orange warning flags at each corner and at the widest points of the load.
- Amber warning lights or clearance lights when moving at night, where night travel is allowed.
Hawaii specifics
- Banner size, flag size and light rules for Hawaii are listed on your permit.
- We include them in your permit notes so your driver has them before the trip.
Rules change. Limits and requirements are set by the state DOT and can change. We confirm the current rules for your exact load before filing.