Alaska Oversize & Overweight Permits
Legal height is 15' here, not 13'6", and 17' on the Elliott and Dalton corridors, so watch your number crossing in. Over 8'6" wide, 15' high, 75' overall, or 80,000 lb, you need a DOT&PF permit (17 AAC 25). Single trip runs about $25; annual overwidth is $500, overlength $450. Travel is daylight only, Monday through Saturday noon. Over 18' wide, 18' high, 150' long, or 250,000 lb is a superload.
When Alaska needs a permit
Legal height is 15' here, not 13'6", and 17' on the Elliott and Dalton corridors, so watch your number crossing in. Over 8'6" wide, 15' high, 75' overall, or 80,000 lb, you need a DOT&PF permit (17 AAC 25). Single trip runs about $25; annual overwidth is $500, overlength $450. Travel is daylight only, Monday through Saturday noon. Over 18' wide, 18' high, 150' long, or 250,000 lb is a superload.
Thresholds, escorts, and curfews
- Legal max before a permit: Permit needed over 8'6" wide, 15' high (17' on the Elliott and Dalton corridors), 75' overall (53' trailer, 45' single unit), or 80,000 lb. Note the legal height is 15', not the 13'6" you see on most maps.
- Escort / pilot car: 1 pilot car over 10'6" wide, 2 over 12', 3 over 14', 4 over 18'. On length, 1 escort for a single unit over 65' or a combination over 85', 2 for a single unit over 85' or a combination over 100', and 3 for anything over 150'. Speed drops to 45 mph over 14' wide, 40 mph over 18', and 35 mph over 22'. The pilot/escort must be a legal-size car or light truck, not towing, with 360-degree visibility, a roof-mounted amber beacon visible 500 feet, and OVERSIZE/WIDE LOAD/LONG LOAD signs. A vehicle needing its own permit cannot escort another load.
- Superload: Superload over 18' wide, 18' high, 150' long, or 250,000 lb. It moves under a special-load permit with engineering and route review.
- Travel curfew: Over-width runs daylight only unless you carry the clearance lights and retroreflective tape in the manual's Hours of Darkness section. The weekend restriction, no movement after noon Saturday or any time Sunday, is written on the permit and attaches to loads over 10'6" wide, over 17' high, over 85' overall, or with a front overhang over 10' or a rear overhang over 4'. Movement is barred for 84 hours starting at noon the Friday before a Sunday or Monday holiday, or noon the Thursday before a Friday or Saturday holiday, on Memorial Day, Independence Day, and Labor Day. From October 1 to April 15 the weekend rule lifts north or east of the Fox Weigh Station on the Steese, Elliott, and Dalton.
- Permit fee: About $25 for a single-trip permit. Annual overwidth permit $500 (to 10'6" wide); annual overlength $450 (to 85' overall, 53' trailer); annual permits can top $1,000 depending on load.
Alaska Oversize Permit FAQ
When do I need an oversize permit in Alaska?
Does Alaska require a pilot car or escort?
Can I move an oversize load at night or on weekends in Alaska?
What does an oversize permit cost in Alaska?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://dot.alaska.gov/mscvc/assets/webdocs/permits_manual.pdf. See our Terms & Disclaimer.
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