| State | Rural Interstates | Urban Interstates | Other Limited Access Roads | |||
| Cars (mph) | Trucks (mph) | Cars (mph) | Trucks (mph) | Cars (mph) | Trucks (mph) | |
| Alabama | 70 | 70 | 65 | 65 | 65 | 65 |
| Alaska 1 | 55 (65 on select interstate routes by engineering investigation and case by case, not automatic or default) | 55 (65 on select interstate routes by engineering investigation and case by case, not automatic or default) | 55 (65 on select interstate routes by engineering investigation and case by case, not automatic or default) | 55 (65 on select interstate routes by engineering investigation and case by case, not automatic or default) | 55 | 55 |
| Arizona | 75 | 75 | 65 | 65 | 65 | 65 |
| Arkansas | 75 | 70 | 65 (60 on specified roads) | 65 (60 on specified roads) | 75 | 75 |
| California | 70 | 55 | 65 | 55 | 70 | 55 |
| Colorado | 75 | 75 | 65 | 65 | 65 | 65 |
| Connecticut | 65 | 65 | 55 | 55 | 65 | 65 |
| Delaware | 65 | 65 | 55 | 55 | 65 | 65 |
| D.C. | 55 | 55 | N/A | N/A | N/A | N/A |
| Florida | 70 | 70 | 65 | 65 | 70 | 70 |
| Georgia | 70 | 70 | 70 | 70 | 65 | 65 |
| Georgia’s ‘Super Speeder Law’ adds on $200 in state fees for any driver convicted of speeding at >75 on any two-lane roads or >85 on multiple lane roads anywhere in the state. | ||||||
| Guam | Guam does not have any Interstates. The maximum speed limits for cars and trucks are: 35 in rural area; 15 in residential areas; and 15 or 25 in school zones. | |||||
| Hawaii | 60 | 60 | 60 | 60 | 55 | 55 |
| Idaho | 75; 80 on specified segments | 70 | 75; 80 on specified segments | 65 | 70 | 70 |
| Illinois | 70 | 70 | 55 | 55 | 65 | 55 |
| Indiana | 70 | 65 | 55 | 55 | 60 | 60 |
| Iowa | 70 | 70 | 70 | 70 | 55 | 55 |
| Kansas | 75 | 75 | 70 | 70 | 70 | 70 |
| Kentucky | 65 | 65 | 65 | 65 | 65 | 65 |
| 70 on specific segments based on an engineering and traffic investigation | ||||||
| Louisiana | 75 | 75 | 70 | 70 | 70 | 70 |
| Maine | 75 | 75 | 75 | 75 | 75 | 75 |
| Maryland | 70 | 70 | 70 | 70 | 55 | 55 |
| Massachusetts | 65 | 65 | 65 | 65 | 65 | 65 |
| Michigan | 70 (75 on select segments) | 65 | 70 | 60; 55 if speed limit for cars is <70 | 70 | 60; 55 if speed limit for cars is <70 |
| Minnesota | 70 | 70 | 65 | 65 | 65 | 65 |
| Mississippi | 70 | 70 | 70 | 70 | 70 | 70 |
| Missouri | 70 | 70 | 60 | 60 | 70 | 70 |
| Montana | 80 | 70 | 65 | 65 | Day: 70 Night: 65 | Day: 70 (Light Trucks), 60 (Heavy Trucks) Night: 65 (Light Trucks), 55 (Heavy Trucks) |
| Nebraska | 75 | 75 | 70 | 70 | 70 | 70 |
| Nevada | 80 | 80 | 65 | 65 | 70 | 70 |
| New Hampshire | 65 (70 on specified segments) | 65 (70 on specified segments) | 65 (70 on specified segments) | 65 (70 on specified segments) | 55 (70 on specified segments) | 55 (70 on specified segments) |
| New Jersey | 65 | 65 | 55 | 55 | 65 | 65 |
| New Mexico | 75 | 75 | 75 | 75 | 65 | 65 |
| New York | 65 | 65 | 55 | 55 | 55 | 55 |
| North Carolina | 70 | 70 | 70 | 70 | 70 | 70 |
| North Dakota | 75 | 75 | 75 | 75 | 4-lane: 70; other: 65 | 4-lane: 70; other: 65 |
| Northern Mariana Islands | None | None | 45 | 25 | None | None |
| Ohio | 70 | 70 | 65 | 65 | 70 | 70 |
| Oklahoma | 75 | 75 | 70 | 70 | 70 | 70 |
| Oregon | 65 (70 on specified segments) | 65 | 55 | 55 | 65 | 65 |
| Pennsylvania | 70 | 70 | 70 | 70 | 70 | 70 |
| Rhode Island 2 | 65 | 65 | 55 | 55 | 55 | 55 |
| South Carolina | 70 | 70 | 70 (60 on specified segments) | 70 (60 on specified segments) | 60 | 60 |
| South Dakota | 80 | 80 | 80 | 80 | 70 | 70 |
| Tennessee | 70 | 70 | 70 | 70 | 65 | 65 |
| Texas | 75; 80 or 85 on specified segments | 75; 80 or 85 on specified segments | 75 | 75 | 75 | 75 |
| Utah | 75; 80 on specified segments | 75; 80 on specified segments | 65; 70 on specified segments | 65; 70 on specified segments | 75 | 75 |
| Vermont | 65 | 65 | 55 | 55 | 50 | 50 |
| Virgin Islands | 40 | 40 | 55 | 55 | 20 | 20 |
| Virginia | 70 | 70 | 70 | 70 | 65 | 65 |
| Washington | 70 | 60 | 60 | 60 | 60 | 60 |
| West Virginia 3 | 70 | 70 | 60 or 65 | 60 or 65 | 65 | 65 |
| Wisconsin | 70 | 70 | 70 | 70 | 70 | 70 |
| Wyoming | 75 (80 on specified segments) | 75 (80 on specified segments) | 65 (70 on specified segments) | 65 (70 on specified segments) | ||
1 Alaska’s default speed limit is 55 mph. 65 on select Interstate routes is by engineering investigation and case by case, not automatic or default.
2 Rhode Island speed limits are not set by law, but by state traffic commission.
3West Virginia speed limits, in general, are not set by law, but by the Commissioner of the Division of Highways.
Updated – April 2024