Federal & State Regulations | Speed limits - maximum for commercial motor vehicles state comparison

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Keep in mind that the speed limit is a guideline. Weather, road conditions, and terrain are other important factors that must be considered when determining appropriate speed.

State comparison

State	Speed Limit (except when otherwise posted)
Alabama	70 mph rural interstate; 65 mph selected 4-lane hwy.
Alaska	65 mph
Arizona	75 mph rural interstates
Arkansas	75 mph on controlled access highways; 65 mph other roadways
California	55 mph all hwy. for most vehicles
Colorado	75 mph rural interstate; 65 mph surfaced 4-lane interstates; 55 mph other hwy.; 40 mph open mountain hwy.
Connecticut	65 mph interstate hwy.; 55 mph limited access state hwy.
Delaware	65 mph specified hwy.; 55 mph other hwy.
D.C.	50 mph all hwy.
Florida	70 mph rural interstates; 65 mph selected 4-lane hwy.; 55 mph most other hwy.
Georgia	70 mph rural areas; 55 mph to 65 mph other hwy.
Hawaii	40 mph to 60 mph depending on hwy. used
Idaho	80 mph on designated portions of interstates; 75 mph on interstates; 70 mph on designated portions of interstates for vehicles with 5 or more axles and GVW > 26,000 lb; 65 mph on interstates for vehicles with 5 or more axles and GVW > 26,000 lb; 70 mph or less on state highways
Illinois	70 mph on rural interstates; 65 mph on 4-lane divided highways; 55 mph on all highways (or as posted); 60 mph (or as posted) for a second division vehicle designed or used for the carrying of a GVW of 8,001 lb or more (including the weight of the vehicle and maximum load) outside an urban area in Cook, DuPage, Kane, Lake, McHenry, and Will counties
Indiana	70 mph interstates and certain state hwy. if the vehicle has a declared GVW of 26,000 lb or less; 65 mph on interstates and certain state hwy. if the vehicle has a declared GVW > 26,000 lb; 60 mph on selected, divided hwy.
Iowa	70 mph interstate roads; 65 mph fully controlled-access, divided, multi-lane hwy.; 55 mph other hwy.
Kansas	75 mph rural interstates; 55 mph to 65 mph other hwy.
Kentucky	70 mph selected interstate hwy. and parkways; 65 mph interstate hwy. and parkways; 55 mph all other state hwy.; 35 mph business and residential districts
Louisiana	70 mph non-urban interstate; 55 to 60 mph other hwy.
Maine	75 mph on interstates and other divided controlled-access highways; 60 mph (or as posted) on other hwy.
Maryland	70 mph most rural interstates; 50 to 55 mph other hwy.
Massachusetts	65 mph designated hwy.; 55 mph or less on other hwy.
Michigan	65 mph on a limited access freeway or state trunk line highway for a truck with a gross weight of 10,000 pounds or more, a truck-tractor, a truck-tractor with a semi-trailer or trailer, or a combination of these vehicles. These vehicles may not exceed 65 mph when the posted speed limit is greater than 65 mph.
Minnesota	70 mph rural interstates; 55 mph to 65 mph other hwy.
Mississippi	70 mph rural interstates; 65 mph 4-lane hwy.; 55 mph all other hwy.
Missouri	70 mph rural interstates; 65 mph rural expressways; 60 mph urban interstates; 55 mph state hwy.
Montana	Straight trucks or truck-tractors with single/double trailers over one ton manufacturer's capacity are limited to: 65 mph day and night on rural interstates; 60 mph during the day and 55 mph at night. On other hwy. triples (or extended doubles) 55 mph day and night all roads where permitted
Nebraska	75 mph rural interstates; 65 mph selected 4-lane hwy.; 60 mph most other 2-lane hwy.
Nevada	55 to 80 mph
New Hampshire	70 mph on I-93 from MM45 to the Vermont border; 65 mph on rural interstates; 55 mph elsewhere
New Jersey	65 mph designated interstates; 55 mph designated state hwy. and all interstates
New Mexico	75 mph rural interstates
New York	65 mph designated roadways; 55 mph elsewhere
North Carolina	65 to 70 mph rural interstates; 55 to 65 mph non-interstate hwy. with controlled access
North Dakota	75 mph interstates; 70 mph multi-lane divided hwy.; 65 mph paved 2-lane hwy.
Ohio	70 mph on Ohio Turnpike and certain sections of interstates (as posted)
Oklahoma	75 mph turnpikes; 70 mph rural interstates; 65 mph state hwy.
Oregon	65 mph
Pennsylvania	70 mph rural interstates and expressways; 55 mph other hwy.
Rhode Island	65 mph rural interstates; 55 mph other hwy.
South Carolina	70 mph rural interstates; 65 mph 4-lane roads; 55 mph all other hwy.
South Dakota	80 mph designated rural interstates; 70 mph select 4-lane highways; 65 mph other main hwy.
Tennessee	70 mph rural interstates; 55 mph urban interstates and non-interstate hwy.; TCA 55-8-152 states that in the left-hand lane of all controlled-access highways which are federal or state routes, it shall be unlawful for any person to operate or drive a motor vehicle at a rate of less than 55 mph
Texas	75-85 mph on specified segments of highway (when posted) outside an urban area; 70 mph outside an urban area
Utah	75 mph to 80 mph on rural interstates; 65 mph on other highways, unless conditions dictate slower speeds or if dictated as a maximum speed restriction on the special permit
Vermont	65 mph rural interstates; 55 mph selected urban interstates; 50 mph all other hwy.
Virginia	70 mph certain rural interstates; 55 mph day/night on all other hwy.
Washington	60 mph rural interstates for all vehicles over 10,000 lb GVW and vehicles in combination (excluding auto stages); 55 to 60 mph day/night all other hwy.
West Virginia	70 mph rural interstates; 55 mph primary hwy.
Wisconsin	70 mph on interstates, freeways, and expressways (where posted); 65 mph on expressways; 55 mph on two-lane highways
Wyoming	75-80 mph rural interstates; 65 mph on 2-lane hwy.

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