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'
28'
Not Specified
but trailers are
limited to 28' each
20,000
34,000
80,000 (1)(2)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
700 lbs./inch of width
for all tires
20,000
34,000
80,000
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102" (3)
13'6"
45'
53'
Not Permitted
65'
Allowed on
designated routes
only
Not Permitted
 
(1)  Provided vehicle complies with Federal bridge gross weight formula.
(2)  Interstate routes only.  Access route limits vary by highway class from 44,000 lbs. to 80,000 lbs.
(3)  15 miles from all interstate and parkway exits.