Department of Transportation
DOT&PF
Alaska • United States of America
The Alaska Department of Transportation and Public Facilities (DOT&PF) manages over 5,600 miles of state roads, 717 bridges, 249 airports, 15 ferries on the Alaska Marine Highway System, and numerous harbors. Given Alaska's remote geography, the department plays a critical role in keeping supply chains moving for truckers and commercial operators navigating challenging terrain and extreme weather. DOT&PF operates three regional offices — Northern, Central, and Southeast — each managing unique infrastructure challenges including permafrost roads and seasonal closures.
| Official Website | https://dot.alaska.gov/ |
|---|---|
| Data API | https://511.alaska.gov/ |
| Founded | 1959 |
| Headquarters | Anchorage |
Available Data
Social Media
- @alaska511 — Alaska 511
Alaska 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 | 20000 lbs |
| Tandem Axle | 38000 lbs |
Dimensional Limits
| Category | Limit |
|---|---|
| Max Height | 14 ft |
| Max Width | 8.5 ft |
| Max Length (Single Unit) | 40 ft |
| Max Length (Combination) | 75 ft |
OS/OW Permits
Seasonal Restrictions Apr, May, Jun
Spring breakup (typically April through June) causes extensive and widespread road weight restrictions statewide. Many unpaved roads in rural Alaska become impassable. Weight restrictions can be severe (50% or more reduction). Winter ice roads in northern and western Alaska allow very heavy loads during the frozen season (December–March) on routes that are inaccessible the rest of the year.
8¢/gal
Member
Special Exemptions
Notable Rules
Alaska has the lowest diesel fuel tax rate in the US. The state has no Interstate highway connections to the lower 48; all freight arrives by ship or air. Spring breakup is the most significant annual road event for commercial transport. The Dalton Highway (US-11) serves the North Slope oil fields with unique seasonal regulations. Winter ice roads in rural areas require separate permits and are subject to strict weight-per-axle limits based on ice thickness.
Sources
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