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"
13'6"
53'
(1)
28'6"
Not Specified
(2)
20,000
35,200
80,000
(3)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Not Specified
22,000
39,600
80,608
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102"
13'6"
40'
53'
(1)
53'
Not Specified
Not Permitted
Not Permitted
None
(1)  Trailers over 50' require no more than 41' spacing, as measured from kingpin to center of rearmost axle or center of tandem axle group.
(2)  Length of doubles not specified but trailers are limited to 28'6" each.
(3)  Provided vehicle complies with Federal bridge gross weight formula.