The American Driver
From Drivers...For Drivers
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National Weight & Size Provisions
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Semi-Trailer in
Tractor-Semi-Trailer Combo
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Gross Vehicle Weight
(lb.)
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State/Provincial Weight & Size Limits
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Gross Vehicle Weight
(lb.)
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Tractor &
Semi-Trailer &
Full Trailer
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(1) Measured from kingpin to end of trailer or load. If trailer length exceeds 48', the distance from the kingpin to the center of the rear axle or group limited to 41'. 48' or shorter
trailers: no kingpin requirements.
(2) Length of doubles not specified but trailers are limited to 28'6" each.
(3) Trailers measuring 48' to 50' from kingpin to rear of trailer require a distance of 41' or less from kingpin to center of rear axle group.
(4) But trailer may not exceed 50', or 41' axle group from kingpin to center of rear axle.
(5) Allowed if both trailers are 28'6" or less.
