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Table 3-4. Semitrailer Length Limitations on the National Truck Network by State: 2007

In addition to weight, Federal and state governments place limits on the length and other characteristics of commercial trucks using the road system. Twenty-nine states have semitrailer length limitations on the National Truck Network other than the 48-foot limit set by Federal law for a semitrailer operating in a truck tractor-semitrailer combination.

Table in Excel format | Historical data

State Length limitation
(feet and inches)
States not listed 48-0
Alabama 53-6
Arizona 57-6
Arkansas 53-6
California1 48-0
Colorado 57-4
Delaware 53-0
Illinois 53-0
Indiana2 48-6
Iowa 53-0
Kansas 57-6
Kentucky 53-0
Louisiana 59-6
Mississippi 53-0
Missouri 53-0
Montana 53-0
Nebraska 53-0
Nevada 53-0
New Mexico 57-6
North Dakota 53-0
Ohio 53-0
Oklahoma 59-6
Oregon 53-0
Pennsylvania 53-0
Rhode Island 48-6
South Dakota 53-0
Tennessee 50-0
Texas 59-0
Wisconsin3 48-0
Wyoming 57-4

1Semitrailers up to 53 feet may also operate without a permit by conforming to a kingpin-to-rearmost axle distance of 38 feet.
2Semitrailers up to 53 feet in length may operate without a permit by conforming to a kingpin-to-rearmost axle distance of 40 feet and 6 inches. Semitrailers that are consistent with 23 CFR 23 658.13(h) may operate without a permit provided the distance from the kingpin to the center of the rear axle is 46 feet or less.
3Semitrailers up to 53 feet in length may operate without a permit by conforming to a kingpin-to-rearmost axle distance of 41 feet, measured to the center of the rear tandem assembly. Semitrailers that are consistent with 23 CFR 658.13(h) may operate without a permit provided the distance from the kingpin to the center of the rear axle is 46 feet or less.

Note: The National Truck Network is the composite of the individual network of highways from each state on which vehicles authorized by the Surface Transportation Assistance Act of 1982 are allowed to operate.

Source: U.S. Department of Transportation, Federal Highway Administration, Truck Size and Weight, Route Designations - Length, Width and Weight Limitations, Code of Federal Regulations, Title 23, Part 658.


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