Speed Limits by State 2025
State | Rural Interstates↓ | Urban Interstates | Limited Access Roads | Other Roads | Additional Speed Limit Details | |
|---|---|---|---|---|---|---|
 | District of Columbia | n/a | 55 | n/a | 25 | The District of Columbia lacks rural interstate highways and limited access roads. As such, data for those categories does not exist. |
 | Montana | 80 (70 for trucks) | 65 | 70 (day), 65 (night) | 70 (day), 65 (night) | |
 | Nevada | 80 | 65 | 70 | 70 | |
 | South Dakota | 80 | 80 | 70 | 70 | The Transportation Commission may establish a maximum speed limit of less than 80 upon any highway or portion of highway under the jurisdiction of the Department of Transportation, and any portion of highway under the jurisdiction of a state or federal agency. |
 | Texas | 75; 80 or 85 on specified segments of road | 75 | 75 | 75 | Sections of I-10 and I-20 in West Texas and sections of Highway 45 in Travis County have a speed limit for passenger cars and light trucks of 80 mph. Speed limits of up to 85 mph may be established if the highway is originally constructed and designed to accommodate the higher speed and it has been determined by an engineering study to be reasonable and safe. State Highway 130 (portions toll) has a posted limit of 85 mph |
 | Idaho | 75; 80 on specified segments of road 70 everywhere for trucks | 75; 80 on specified segments of road 65 everywhere for trucks | 70 | 70 | In Idaho, the speed limit may be increased to 80 mph on specific segments of highway on the basis of an engineering and traffic investigation |
 | Oklahoma | 75; 80 on specified segments of road | 70 | 70 | 70 | In Oklahoma, a speed limit of 80 mph may be posted on portions of the turnpike if approved by the Oklahoma Turnpike Authority, effective November 1, 2019. The State Highway Commission may determine that a maximum limit upon any part of the state highway system is greater or less than reasonable upon the basis of an engineering and traffic investigation |
 | Utah | 75; 80 on specified segments of road | 70 | 75 | 65 | In Utah, the speed limit may be increased beyond 75 mph on any freeway or limited access highway on the basis of an engineering and traffic investigation. The highest posted limit in Utah is currently 80mph |
 | Wyoming | 75; 80 on specified segments of road | 75; 80 on specified segments of road | 70 | 70 | In Wyoming, the speed limit may be increased to 80 mph on specific segments of highway on the basis of an engineering and traffic investigation. |
 | Arizona | 75 | 65 | 65 | 65 (65 for trucks) | |
 | Colorado | 75 | 65 | 65 | 65 | |
 | Kansas | 75 | 75 | 75 | 65 | |
 | Louisiana | 75 | 70 | 70 | 65 | |
 | Maine | 75 | 75 | 75 | 60 | |
 | Nebraska | 75 | 70 | 70 | 65 | |
 | New Mexico | 75 | 75 | 65 | 55 | |
 | North Dakota | 75 | 75 | 70 | 65 | |
 | Michigan | 70 (75 on specified segments) for cars; 65 everywhere for trucks | 70 | 70 | 55 | |
 | Washington | 70 (75 on specified segments) for cars; 60 everywhere for trucks | 60 | 60 | 60 | In Washington State, maximum speed limits on highways or portions of highways may be posted as high as 75 mph if based on a traffic and engineering study, effective August 2015 |
 | Arkansas | 70 (75 for trucks) | 65 | 75 (70 for trucks) | 65 | |
 | Indiana | 70 (65 for trucks) | 55 | 60 | 55 | |
 | California | 70 (55 for trucks) | 65 (55 for trucks) | 70 (55 for trucks) | 65 (55 for trucks) | |
 | Alabama | 70 | 65 | 65 | ||
 | Florida | 70 | 65 | 70 | 65 | |
 | Georgia | 70 | 70 | 65 | 65 | |
 | Iowa | 70 | 55 | 70 | 65 | |
 | Maryland | 70 | 70 | 70 | 55 | |
 | Minnesota | 70 | 65 | 65 | 60 | |
 | Mississippi | 70 | 70 | 70 | 65 | |
 | Missouri | 70 | 60 | 70 | 65 | |
 | South Carolina | 70 | 70 | 60 | 55 | |
 | Virginia | 70 | 70 | 65 | 55 | |
 | West Virginia | 70 | 55 | 65 | 55 | |
 | Wisconsin | 70 | 70 | 70 | 55 | |
 | Illinois | 70 | 55 | 65 | 55 | The Illinois law allows Cook, DuPage, Kane, Lake, Madison, McHenry, St. Clair and Will Counties to opt-out by adopting an ordinance that sets a lower maximum speed limit, empowering counties to make adjustments based on their own local needs. These counties have a maximum large truck speed limit of 60 mph outside of urban districts and 55 mph inside urban districts |
 | North Carolina | 70 | 70 | 70 | 55 | |
 | Ohio | 70 | 65 | 70 | 55 | |
 | Pennsylvania | 70 | 70 | 70 | 55 | |
 | Tennessee | 70 | 70 | 70 | 65 | |
 | Kentucky | 65 (70 on specified segments) | 65 | 65 | 55 | In Kentucky, the speed limit may be increased to 70 mph on specific segments of highway on the basis of an engineering and traffic investigation. |
 | New Hampshire | 65 (70 on specified segments) | 65 | 55 | 55 | 2013 New Hampshire House Bill 146 raised the speed limit from 65 to 70 mph on the portion of I-93 from mile marker 45 to the Vermont border |
 | Oregon | 65 (70 on specified segments ) for cars, 55 (65 on specified segments) for trucks | 55 | 65 | 65 | |
 | Alaska | 65 | 55 | 65 | 55 | |
 | Connecticut | 65 | 55 | 65 | 55 | |
 | Delaware | 65 | 55 | 65 | 55 | |
 | Massachusetts | 65 | 65 | 65 | 55 | |
 | New Jersey | 65 | 55 | 65 | 55 | |
 | New York | 65 | 65 | 65 | 55 | |
 | Rhode Island | 65 | 55 | 55 | 55 | |
 | Vermont | 65 | 55 | 50 | 50 | |
 | Hawaii | 60 | 60 | 55 | 45 | In Hawaii, the maximum speed limit is established by county ordinance or by the director of transportation |
Speed limits are restrictions on the minimum and maximum speeds vehicles may travel on a given stretch of road. Speed limits are designated by signs and are used in many countries. In the United States, speed limits are used to protect drivers and regulate unruly or dangerous behavior on the roads.
There is no guarantee that posting speed limits has any effect on driver behaviors, as most drivers will ultimately travel at the speed that they feel the most comfortable going. However, law enforcement does monitor the speed of motorists and their failure to adhere to posted speed limits can result in fines and, depending on how fast a driver is going, arrest.
Speed limits vary between states and are often different for rural interstates, urban interstates, and other types of roads. Montana has different speed limits for day and night on certain types of roads. Some states, such as California and Arkansas, have different speed limits for trucks and cars.
There are three main categories of roads: arterial, collector, and local. Arterial roads have higher speeds and fewer access points, such as on- and off-ramps. Collector roads have high speeds and are balanced to have more access points. Local roads have lower speeds and more access points, such as intersections and cross streets. The difference between these three types of streets is the reason why there are different speed limits. Roads with fewer travelers and fewer vehicles attempting to cross one another can sustain higher speeds, while roads with more volume of travelers and have more bikers or pedestrians need to have lower speeds.
Texas has the highest speed limits in the United States. Rural interstates have a speed limit of 85 miles per hour while urban interstates both have a speed limit of 75 miles per hour. Other roads that are not residential are posted at 75 miles per hour as well.
Hawaii has the overall lowest speed limit in the United States. Rural freeways have a maximum speed limit of 60 miles per hour. Urban interstates in Hawaii have a speed limit of as low as 50 miles per hour. Please note that Hawaii speed limits vary between islands. It is crucial to read all road signage to avoid speeding.
