The American Driver
From Drivers...For Drivers
National Weight & Size Provisions
Width
Height
Semi-Trailer in
Tractor-Semi-Trailer Combo
Full Trailer
Doubles
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
102"
14'0"
53'
48'
Not Specified (1)
Not Applicable
Not Applicable
Not Applicable
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
600 lb./inch (2)
20,000
or 550 lb./inch
38,000
or 550 lb./inch
Determined by Formula
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102"
14'0"
45'
48' (3)
48'
75'
90'
(up to 120' on
certain routes)
(4)
(5)
(1)  Length limited to 95' from front of first trailer to rear of second trailer.
(2)  Weights based on 10" or greater tire widths.
(3)  53' trailers allowed on certain routes. (Check Chapter 25 Operations, Wheeled Vehicles)
(4)  By specialized seasonal permit only on limited routes.
(5)  Seasonal weight limits vary by District; Fax-on-demand information available at 907-348-9876 from your fax-touchtone phone or visit www.dot.state.ak.us