Maximum Posted Speed Limits By State
Below is a detailed breakdown for the maximum speed limits by State according to the Insurance Institute for Highway Safety (IIHS).
Please note: these limits are a guideline only. You should always check with the appropriate local authority for definitive speed limit recommendations.
Maximum Posted Speed Limits By State (Chart)
| State | Rural Interstates (mph) | Urban Interstates (mph) | Other Limited Access Roads (mph) | Other Roads (mph) |
| Alabama | 70 | 65 | 65 | 65 |
| Alaska | 65 | 55 | 65 | 55 |
| Arizona | 75 | 65 | 65 | 65 |
| Arkansas | 70-75 | 65 | 70 | 65 |
| California | 55 | 55-65 | 55 | 55-65 |
| Colorado | 75 | 65 | 65 | 65 |
| Connecticut | 65 | 55 | 65 | 55 |
| Delaware | 65 | 55 | 65 | 55 |
| District of Columbia | n/a | 55 | n/a | 25 |
| Florida | 70 | 65 | 70 | 65 |
| Georgia | 70 | 70 | 65 | 65 |
| Hawaii | 60 | 60 | 55 | 45 |
| Idaho | 75-80 | 75-80 | 70 | 70 |
| Illinois | 70 | 55 | 65 | 55 |
| Indiana | 65-70 | 55 | 60 | 55 |
| Iowa | 70 | 55 | 70 | 65 |
| Kansas | 75 | 75 | 75 | 65 |
| Kentucky | 65-70 | 65 | 65 | 55 |
| Louisiana | 75 | 70 | 70 | 65 |
| Maine | 75 | 75 | 75 | 60 |
| Maryland | 70 | 70 | 70 | 55 |
| Massachusetts | 65 | 65 | 65 | 55 |
| Michigan | 65-70 | 70 | 70 | 55 |
| Minnesota | 70 | 65 | 65 | 60 |
| Mississippi | 70 | 70 | 70 | 65 |
| Missouri | 70 | 60 | 70 | 65 |
| Montana | 70-80 | 65 | 65-70 | 65-70 |
| Nebraska | 75 | 70 | 70 | 65 |
| Nevada | 80 | 65 | 70 | 70 |
| New Hampshire | 65-70 | 65 | 55 | 55 |
| New Jersey | 65 | 55 | 65 | 55 |
| New Mexico | 75 | 75 | 65 | 55 |
| New York | 65 | 65 | 65 | 55 |
| North Carolina | 70 | 70 | 70 | 55 |
| North Dakota | 75 | 75 | 70 | 65 |
| Ohio | 70 | 65 | 70 | 55 |
| Oklahoma | 75-80 | 70 | 70 | 70 |
| Oregon | 65-70 | 55 | 65 | 65 |
| Pennsylvania | 70 | 70 | 70 | 55 |
| Rhode Island | 65 | 55 | 55 | 55 |
| South Carolina | 70 | 70 | 60 | 55 |
| South Dakota | 80 | 80 | 70 | 70 |
| Tennessee | 70 | 70 | 70 | 65 |
| Texas | 75-85 | 75 | 75 | 75 |
| Utah | 75-80 | 65 | 75 | 65 |
| Vermont | 65 | 55 | 50 | 50 |
| Virginia | 70 | 70 | 65 | 55 |
| Washington | 70-75 | 60 | 60 | 60 |
| West Virginia | 70 | 55 | 65 | 55 |
| Wisconsin | 70 | 70 | 70 | 55 |
| Wyoming | 75-80 | 75-80 | 70 | 70 |
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