Alaska commercial vehicle weight limits follow the federal Interstate standard of 105,500 lbs gross, 20,000 lbs per single axle, and 38,000 lbs per tandem axle group. The federal bridge formula (23 U.S.C. 127) applies on all routes. Alaska imposes seasonal spring breakup restrictions March–May on secondary roads as frozen ground thaws and loses load-bearing capacity. Ice road weight limits are set seasonally by measured ice thickness — typically operational December through March. Check AKDOT for current restrictions before routing. Oversize and overweight permits are available from AK DOT for loads exceeding standard limits. Verify current road-specific postings with the Alaska DOT before routing heavy loads.
Alaska imposes seasonal spring breakup restrictions March–May on secondary roads as frozen ground thaws and loses load-bearing capacity. Ice road weight limits are set seasonally by measured ice thickness — typically operational December through March. Check AKDOT for current restrictions before routing.
Check current restrictions at AK DOT →The federal bridge formula limits the weight on any group of axles based on the distance between the outermost axles in the group. It applies in Alaska on all routes where federal standards apply.
W = maximum weight in lbs · L = axle spacing in feet · N = number of axles
AKDOT issues oversize/overweight permits for loads exceeding Alaska's already-generous base limits. Single-trip permits for one-time movements. Annual permits for qualifying repetitive operations. Superload permits for extreme weights or dimensions require engineering review and pre-approved routing. Dalton Highway and North Slope hauls often require special coordination with AKDOT and oil field operators.
Apply for Alaska OS/OW Permit →Alaska allows a maximum gross vehicle weight of 105,500 lbs on its state highway system — well above the federal 80,000 lb Interstate limit. This higher limit reflects Alaska's need to move heavy loads efficiently across its limited road network for resource extraction and remote community supply operations.
Yes. Alaska imposes spring breakup restrictions on secondary roads typically from March through May as the ground thaws and loses load-bearing capacity. Restrictions vary by road and year depending on weather conditions. Check AKDOT's current restriction postings before routing on secondary or rural roads during this period.
Alaska ice road weight limits are set each season based on measured ice thickness, monitored by AKDOT and posted at ice road access points. Early-season limits may be 40,000 lbs or less; mature winter ice can support 80,000 lbs or more. Drivers must check current posted limits before every crossing — exceeding limits risks catastrophic ice failure with no recovery.
AKDOT issues oversize/overweight permits through the Statewide Maintenance and Operations permits office. Apply at dot.alaska.gov/stwdmnt/permits. Single-trip and annual permits are available. Dalton Highway and North Slope operations may require coordination with both AKDOT and oil field operators due to the specialized nature of those corridors.
Alaska's tandem axle limit is 38,000 lbs — 4,000 lbs higher than the federal standard of 34,000 lbs. The tridem axle limit is 54,000 lbs, also well above federal standards. These higher limits accommodate Alaska's heavy industrial and resource-extraction freight needs.
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Disclaimer
The information on this page is compiled from publicly available government sources and is provided for general informational purposes only. TruckRadar is an independent search engine — we are not affiliated with any government agency and this content does not constitute legal or compliance advice. Regulations change frequently; always verify current requirements directly with the official source before making compliance decisions.
Official source: Alaska AK Department of TransportationLast reviewed: 2026-04