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)
53'
Not Specified
but trailers are
limited to 28'6" each
22,400
44,000
80,000 (2)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Not Specified
22,400
44,000
80,000 (3)
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' (4)
28'6"
Not Specified
if trailer is 48'6" or
less
Not Specified
if trailer is 28'6"
or less
Not Permitted
 
(1) Trailers of 48' to 53' require no more than 41' spacing from kingpin to center of rear axle group.
(2) Must comply with Federal bridge formula and have 51' spacing from center of the first to center of the last axle.
(3) 5-axle unit with 51' spacing between 1st and 5th axle.
(4) On Interstates and on non-Interstate routes with prior approval. Call 401-588-3020 x 2034.