| Alabama | 70 | 65 | 65 | 65 |
| Alaska | 65 | 55 | 65 | 55 |
| Arizona | 75 | 65 | 65 | 65 trucks: 65 |
| Arkansas | 75 trucks: 70 | 65 | 75 trucks: 70 | 65 |
| California | 70; trucks: 55 | 65 trucks: 55 | 70 trucks: 55 | 65 trucks: 55 |
| 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 on specified segments of road trucks: 70 | 75; 80 on specified segments of road trucks: 65 | 70 | 70 |
| Illinois | 70 | 55 | 65 | 55 |
| Indiana | 70; trucks: 65 | 55 | 60 | 55 |
| Iowa | 70 | 55 | 70 | 65 |
| Kansas | 75 | 75 | 75 | 65 |
| Kentucky | 65; 70 on specified segments of road | 65 | 65 | 55 |
| Louisiana | 75 | 70 | 70 | 65 |
| Maine | 75 | 75 | 75 | 60 |
| Maryland | 70 | 70 | 70 | 55 |
| Massachusetts | 65 | 65 | 65 | 55 |
| Michigan | 70 (65 trucks); 75 (65 trucks) on specified segments of road | 70 | 70 | 55 |
| Minnesota | 70 | 65 | 65 | 60 |
| Mississippi | 70 | 70 | 70 | 65 |
| Missouri | 70 | 60 | 70 | 65 |
| Montana | 80 trucks: 70 | 65 | day: 70; night: 65 | day: 70; night: 65 |
| Nebraska | 75 | 70 | 70 | 65 |
| Nevada | 80 | 65 | 70 | 70 |
| New Hampshire | 65; 70 on specified segments of road | 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 on specified segments of road | 70 | 70 | 70 |
| Oregon | 65; 70 on specified segments of road trucks: 55; 65 on specified segments of road | 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; 80 or 85 on specified segments of road | 75 | 75 | 75 |
| Utah | 75; 80 on specified segments of road | 65 | 75 | 65 |
| Vermont | 65 | 55 | 50 | 50 |
| Virginia | 70 | 70 | 65 | 55 |
| Washington | 70; 75 on specified segments of road trucks: 60 | 60 | 60 | 60 |
| West Virginia | 70 | 55 | 65 | 55 |
| Wisconsin | 70 | 70 | 70 | 55 |
| Wyoming | 75; 80 on specified segments of road | 75; 80 on specified segments of road | 70 | 70 |
미국은 주마다 도시마다..도시에서도 외곽이나 도심이냐에 따라 고속도로 제한 속도가 다릅니다.
현재 미국내에서 고속도로에서의 운행 속도를 가장 빠르게 허용하는 주는 Texas 주로 최고 85마일 까지 허용하는 지역이 있습니다.
출처 : https://www.iihs.org/topics/speed/speed-limit-laws