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'
28'6"
Not Specified
(1)
20,000
34,000
80,000
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Should not exceed
tire mfg. rating
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"
14'0"
55'
53'
Not Specified
75'
(2)
Allowed only on
Interstate routes
with permit
(3)
(1)  Length of doubles not specified but trailers are limited to 28'6" each.
(2)  Allowed if both trailers are 28'6" or combined trailer length of 61'.
(3)  Seasonal weight limits apply; call 406-444-0468.