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'
53'
110'
20,000
34,000
80,000
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
550 lb./inch
of tire width
20,000
34,000
105,500 (1)
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102"
14'0"
50'
53'
53'
75', 95' and 110'
(2)
75', 95' and 110'
(2)
75', 95' and 110'
(2)
(3)
(1)  On state highways unless posted;  80,000 lb. on county and local roads.
(2)  On designated highways;  75' max on non-designated highways.
(3)  Tractor and full trailer combination not to exceed 75';  seasonal weight limits apply.