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"
59'6"
30'
Not Specified
but trailers are
limited to 30' each
20,000
34,000 (1)
80,000 (2)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
12,000
22,000
37,000
80,000 (3)
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
96"
13'6"
45'
59'6"
30'
65'
Allowed on
designated routes
only
Not Permitted
 
(1)  Two consecutive sets of tandem axles must have 40" or more between the first and last axles of the consecutive set.
(2)  Provided vehicle complies with Federal bridge gross weight formula.
(3)  5-axle combination.