Department of Transportation
HDOT
Hawaii • United States of America
The Hawaii Department of Transportation (HDOT) manages the state's highways, harbors, and airports across the Hawaiian island chain — a unique multi-modal transportation system entirely dependent on sea and air for inter-island freight movement. HDOT's highways division manages the H-1, H-2, H-3, and Belt Road systems across the major islands. Commercial trucking in Hawaii plays an essential role in moving goods from ports to distribution centers and retailers. The department oversees commercial vehicle regulations, harbor freight operations, and manages airport facilities critical to the island economy's supply chain.
| Official Website | https://hidot.hawaii.gov/ |
|---|---|
| Founded | 1959 |
| Headquarters | Honolulu |
Available Data
Social Media
- @DOTHawaii — Hawaii DOT
Hawaii Trucking Regulations
Size & weight limits, OS/OW permits, and seasonal restrictions for commercial vehicles
Weight Limits
| Category | Limit |
|---|---|
| Max Gross Vehicle Weight | 80000 lbs |
| Single Axle | 22500 lbs |
| Tandem Axle | 34000 lbs |
Dimensional Limits
| Category | Limit |
|---|---|
| Max Height | 14 ft |
| Max Width | 9 ft |
| Max Length (Single Unit) | 40 ft |
| Max Length (Combination) | 65 ft |
OS/OW Permits
19¢/gal
Member
Special Exemptions
Notable Rules
Hawaii operates under unique island-state conditions: there are no Interstate highway connections between islands or to the mainland. All freight arrives by ship or air. Each island (Oahu, Maui, Hawaii, Kauai) has a separate road network managed by HDOT and county DOTs. Hawaii allows wider vehicles (9.0 ft) than the federal standard. Weigh-bypass programs (PrePass/Drivewyze) do not operate in Hawaii. Fuel costs are significantly higher than the mainland despite a lower state excise rate.