Maximum posted speed limits by state

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 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^{Footnote 1}	60^{Footnote 1}	55^{Footnote 1}	45^{Footnote 1}
Idaho	75; 80 on specified segments of road ^{Footnote 2} trucks: 70	75; 80 on specified segments of road ^{Footnote 2} trucks: 65	70	70
Illinois	70^{Footnote 3}	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^{Footnote 4}	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^{Footnote 5}	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^{Footnote 6}	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^{Footnote 7}	70	70
Tennessee	70	70	70	65
Texas	75; 80 or 85 on specified segments of road^{Footnote 8}	75	75	75
Utah	75; 80 on specified segments of road^{Footnote 9}	65	75	65
Vermont	65	55	50	50
Virginia	70	70	65	55
Washington	70; 75 on specified segments of road ^{Footnote 10} trucks: 60	60	60	60
West Virginia	70	55	65	55
Wisconsin	70	70	70	55
Wyoming	75; 80 on specified segments of road^{Footnote 11}	75; 80 on specified segments of road^{Footnote 11}	70	70

Footnotes

^{Footnote 1} In Hawaii, the maximum speed limit is established by county ordinance or by the director of transportation. ↩
^{Footnote 2} 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. ↩
^{Footnote 3} 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. ↩
^{Footnote 4} 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. ↩
^{Footnote 5} 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. ↩
^{Footnote 6} 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. ↩
^{Footnote 7} 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. ↩
^{Footnote 8} 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. ↩
^{Footnote 9} 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. ↩
^{Footnote 10} 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. ↩
^{Footnote 11} 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. ↩