---
title: Hawaii Oversize & Overweight Permits (OS/OW) | HDOT Superload | Alpine Truck Service
description: Expedited Hawaii HDOT oversize permits, inter-island barge transport coordination, Honolulu curfews, and police escorts. Call (918) 607-6547.
image: https://www.alpinetruckservice.com/alpine-third-party-charges.webp
---

# Hawaii Oversize, Overweight & Superload Permitting Services

Comprehensive commercial trucking permits and heavy haul compliance across Hawaii.

## Agency & Permitting Authority
- **Agency**: Hawaii Department of Transportation (HDOT)
- **Portal**: HDOT Highways Division Oversize/Overweight Permitting Office
- **Regulatory Advisory**: State DOT regulations and permit processing queues are determined by individual state transportation authorities and vary by agency workload. Carriers should verify active route advisories and state requirements prior to movement.

## Legal vs. Routine Permitted Dimensions
- **Legal Width**: 8' 6" | **Max Routine**: 14' 0"
- **Legal Height**: 14' 0" | **Max Routine**: 15' 0"
- **Legal Length**: 45' Single Unit / 65' Semi-Trailer Overall | **Max Routine**: 75' 0"
- **Legal Gross Weight**: 80,000 lbs | **Max Routine**: 120,000 lbs
- **Axle Limits**: Single: 22,500 lbs, Tandem: 34,000 lbs, Tridem: 42,000 lbs

## Permitting Scope & Services in Hawaii
- **Routine Oversize (OS) Cab-Cards**: Single-trip authorizations for dimensions exceeding 8' 6" width or 14' 0" height.
- **Overweight (OW) Axle Permits**: Overload cab-cards for heavy machinery and configurations exceeding 80,000 lbs GVW.
- **Multi-Axle Superload Permits**: Specialized filings exceeding Over 120,000, including State DOT and certified partner bridge reviews, route surveys, and police escorts.
- **Annual & Blanket Fleet Permits**: Continuous-operation annual highway authorizations for construction fleets.
- **Temporary Trip & Fuel Permits**: 72-hour IRP vehicle registration and IFTA fuel tax credentials.
- **County, City & Toll Road Clearances**: Municipal authorizations and turnpike clearances.

## Superload Permitting & State Review Protocol
- **Weight Trigger**: Over 120,000 lbs GVW or exceeding island bridge load ratings
- **Width Trigger**: Over 14' 0" wide
- **Height Trigger**: Over 15' 0" high
- **Length Trigger**: Over 75' 0" overall length
- **State & Partner Bridge Review**: Hawaii Department of Transportation (HDOT) electronic systems and certified structural engineering partners evaluate axle load distribution across bridge structures upon submission.
- **Route Surveys & Clearances**: Required for extreme heights/widths to verify overhead physical clearances.
- **Utility & Escorts**: Coordinated wire lifts with power utilities and State Police / Highway Patrol escorts.

## Pilot Cars & Escort Vehicle Requirements
- **Front Escort**: Required over 10' 0" wide on 2-lane roads; over 12' 0" wide on multi-lane freeways
- **Rear Escort**: Required over 12' 0" wide on multi-lane freeways or rear overhang exceeding 10' 0"
- **Height Pole**: Required over 14' 6" high (front escort with calibrated height pole)
- **Police Escort**: Honolulu Police / County Police escort required over 14' 0" wide, 15' 0" high, or for night barge transport moves

## Metro Curfews & Travel Restrictions
- **Curfew Zones**:
  - Honolulu Urban Core & H-1 / H-2 Corridors: 6:00–8:30 AM & 3:30–6:00 PM M-F
  - Maui, Kauai, and Hawaii (Big Island) narrow coastal corridor peak hour restrictions
- **Travel Rules**: Daylight only (sunrise to sunset). Night moves permitted on Oahu freeways (H-1, H-2, H-3) with HDOT pre-authorization and police escort. No Sunday travel.

## Key Freight Corridors
- H-1 Freeway (Honolulu East-West Arterial)
- H-2 Freeway (Central Oahu)
- H-3 (Trans-Koolau)
- Route 11/19 (Big Island Belt)
- Route 30 (Maui Honoapiilani Hwy)

## Frequently Asked Questions
### How are oversize permits handled in Hawaii across different islands?
Hawaii DOT permits cover state highways on Oahu, Maui, Hawaii (Big Island), and Kauai. Inter-island transport also requires marine barge coordination with Young Brothers.

### What are Hawaii pilot car and escort requirements?
Escorts are required for loads over 10' wide on narrow island roads and over 12' wide on multi-lane routes. Loads exceeding 14' wide require police escorts.

### What are Honolulu rush hour curfews?
Oversize movements are prohibited on Honolulu state highways and freeways (H-1, H-2, H-3) between 6:00–8:30 AM and 3:30–6:00 PM on weekdays.

### What is Hawaii's legal height limit?
Hawaii allows a legal height of 14'0" on state highways without a permit.

## Contact & Direct Dispatch
- **Direct Phone**: (918) 607-6547 (CALL: [918-607-6547](tel:9186076547))
- **Email**: [permits@alpinetruck.com](mailto:permits@alpinetruck.com)
- **Online Intake**: [alpinetruckservice.com/permits/hawaii](https://www.alpinetruckservice.com/permits/hawaii)