['Size and Weight Limits']
['Sizes and weights']
02/02/2024
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Under CFR 23 – Highways – Part 658 outlines regulations for Truck Size and Weight. Section 658.15 Width - reads that no state shall impose a width limitation of less than 102 inches on vehicles operating on the National Network. This means that all states must allow vehicles 102 inches wide to operate on interstate or designated highways in their state, but the state can and sometimes does set different restrictions when operating on other state supplemental roads.
NOTE: Under Section 658.16 Exclusions from Length and Width Determinations, and Appendix D to Part 658, there are certain components that are excluded by law or regulation from being included in the width measurement of a commercial motor vehicle.
State comparison
| Interstate and designated Federal Aid highways | State and other supplemental highways | |||
|---|---|---|---|---|
| State | Width | Height | Width | Height |
| Alabama | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Alaska | 8' 6" | 15' | 8' 6" | 15' 17' between the Fox Weight Station and Prudhoe Bay on the Dalton and Elliot Highways |
| Arizona | 8' 6" | 14' | 8' | 13' 6" |
| Arkansas | 8' 6" | 14' | 8' 6" 8' for manufactured homes | 14' |
| California | 8' 6" | 14' | 8' 6" | 14' |
| Colorado | 8' 6" | 14' 6" Unless otherwise restricted | 8' 6" | 14' 6" Unless otherwise restricted |
| Connecticut | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Delaware | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| District of Columbia | 8' 6" | 13' 6" | 8' 8' 6" for 15 or greater passenger buses | 13' 6" |
| Florida | 8' 6" | 13' 6" Automobile transporter semitrailers 14' | 8' 6" unless otherwise posted | 13' 6" Automobile transporter semitrailers 14' |
| Georgia | 8' 6" | 13' 6" Auto transporter 14' | 8' 6" | 13' 6" |
| Hawaii | 9' | 14' | 9' | 14' |
| Idaho | 8' 6" | 14' | 8' 6" | 14' |
| Illinois | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Indiana | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Iowa | 8' 6" 12' 5" for certain agricultural commodities | 13' 6" 14' for auto transporters 14' 6" for certain agricultural commodities | 8' 6" 12' 5" for certain agricultural commodities | 13' 6" 14' for auto transporters 14' 6" for certain agricultural commodities |
| Kansas | 8' 6" | 14' | 8' 6" | 14' |
| Kentucky | 8' 6" | 13' 6" Auto-transporters 14' | 8' | 13' 6" Auto-transporters 14' |
| Louisiana | 8' 6" | 14' Interstate only | 8' 6" | 13' 6" |
| Maine | 8' 6" | 13' 6" plus 6" of load, 13' 6" limit on Turnpike | 8' 6" | 13' 6" plus 6" of load, 13' 6" limit on Turnpike |
| Maryland | 8' 6" 8' Harbor Tunnel Thruway and Conowingo Dam | 13' 6" | 8' 6" 8' Harbor Tunnel Thruway and Conowingo Dam | 13' 6" |
| Massachusetts | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Michigan | 8' 6" | 13' 6" | 8' | 13' 6" |
| Minnesota | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Mississippi | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Missouri | 8' 6" | 14' | 8' 6" | 13' 6" 14' auto transporters |
| Montana | 8' 6" | 14' | 8' 6" | 14' |
| Nebraska | 8' 6" | 14' 6" | 8' 6" can be route restricted to 8' | 14' 6" |
| Nevada | 8' 6" | 14' 15' baled hay | 8' 6" | 14' 15' baled hay |
| New Hampshire | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| New Jersey | 8' 6" | 13' 6" | 8' 8' 6" on the NJ 102" truck network | 13' 6" |
| New Mexico | 8' 6" | 14' | 8' 6" | 14' |
| New York | 8' 6" | 13' 6" | 8' 6" Route restricted to 8' | 13' 6" |
| North Carolina | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| North Dakota | 8' 6" | 14' | 8' 6" | 14' |
| Ohio | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Oklahoma | 8' 6" | 14' On turnpike, interstate, or U.S. hwy 14' 6" auto transporters | 8' 6" | 14' On state highways - map available 14' 6" auto transporters |
| Oregon | 8' 6" | 14' | 8' 6" | 14' |
| Pennsylvania | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Rhode Island | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| South Carolina | 8' 6" | 13' 6" 14' auto-transporters | 8' 6" | 13' 6" 14' auto-transporters |
| South Dakota | 8' 6" | 14' | 8' 6" | 14' |
| Tennessee | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Texas | 8' 6" | 14' | 8' 6" | 14' |
| Utah | 8' 6" | 14' | 8' 6" | 14' |
| Vermont | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Virginia | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Washington | 8' 6" | 14' | 8' 6" | 14' |
| West Virginia | 8' 6" | 13' 6" | 8' 6" 8' if lanes under 10' wide | 13' 6" |
| Wisconsin | 8' 6" | 13' 6" | 8' 6" | 13' 6" |
| Wyoming | 8' 6" | 14' | 8' 6" | 14' |
['Size and Weight Limits']
['Sizes and weights']
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Copyright 2025 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.