23 C.F.R. § 658 app B to Part 658
| State | Feet and inches |
| Alabama | 53-6 |
| Alaska | 48-0 |
| Arizona | 57-6 |
| Arkansas | 53-6 |
| California | 1 48-0 |
| Colorado | 57-4 |
| Connecticut | 48-0 |
| Delaware | 53-0 |
| District of Columbia | 48-0 |
| Florida | 48-0 |
| Georgia | 48-0 |
| Hawaii | 48-0 |
| Idaho | 48-0 |
| Illinois | 53-0 |
| Indiana | 2 48-6 |
| Iowa | 53-0 |
| Kansas | 57-6 |
| Kentucky | 53-0 |
| Louisiana | 59-6 |
| Maine | 48-0 |
| Maryland | 48-0 |
| Massachusetts | 48-0 |
| Michigan | 48-0 |
| Minnesota | 48-0 |
| Mississippi | 53-0 |
| Missouri | 53-0 |
| Montana | 53-0 |
| Nebraska | 53-0 |
| Nevada | 53-0 |
| New Hampshire | 48-0 |
| New Jersey | 48-0 |
| New Mexico | 57-6 |
| New York | 48-0 |
| North Carolina | 48-0 |
| North Dakota | 53-0 |
| Ohio | 53-0 |
| Oklahoma | 59-6 |
| Oregon | 53-0 |
| Pennsylvania | 53-0 |
| Puerto Rico | 48-0 |
| Rhode Island | 48-6 |
| South Carolina | 48-0 |
| South Dakota | 53-0 |
| Tennessee | 50-0 |
| Texas | 59-0 |
| Utah | 48-0 |
| Vermont | 48-0 |
| Virginia | 48-0 |
| Washington | 48-0 |
| West Virginia | 48-0 |
| Wisconsin | 3 48-0 |
| Wyoming | 57-4 |
1 Semitrailers up to 53 feet may also operate without a permit by conforming to a kingpin-to-rearmost axle distance of 38 feet. Semitrailers that are consistent with 23 CFR 658.13(g) may operate without a permit provided the distance from the kingpin to the center of the rear axle is 46 feet or less.
2 Semitrailers up to 53 feet in length may operate without a permit by conforming to a kingpin-to-rearmost axle distance of 40 feet 6 inches. Semitrailers that are consistent with 23 CFR 658.13(g) may operate without a permit provided the distance from the kingpin to the center of the rear axle is 46 feet or less.
3 Semitrailers up to 53 feet in length may operate without a permit by conforming to a kingpin-to-rear axle distance of 41 feet, measured to the center of the rear tandem assembly. Semitrailers that are consistent with 23 CFR 658.13(g) may operate without a permit provided the distance from the kingpin to the center of the rear axle is 46 feet or less.
23 C.F.R. § 658 app B to Part 658