Speed Limits By State 2020

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 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.

South Dakota has the highest speed limits in the United States. Rural and urban interstates both have a speed limit of 80 miles per hour and other roads are posted at 70 miles per hour. Hawaii has the overall lowest speed limits in the United States. Rural and urban interstates in Hawaii have a speed limit of 60 miles per hour and other roads are posted at 45 miles per hour.

Below is a table with each state’s speed limits for rural interstates, urban interstates, and other roads.

Speed Limits By State 2020

* All speeds are in miles per hour.
State Rural Interstates Urban Interstates Other Roads 2020 Pop.
Hawaii6060451,412,690
Alaska655555734,002
Connecticut6555553,563,080
Delaware655555982,895
Kentucky6565554,499,690
Massachusetts6565556,976,600
New Hampshire6565551,371,250
New Jersey6555558,936,570
New York65655519,440,500
Oregon6555654,301,090
Rhode Island6555551,056,160
Vermont655550628,061
Alabama7065654,908,620
California70656539,937,500
Florida70656521,993,000
Georgia70706510,736,100
Illinois70555512,659,700
Indiana7055556,745,350
Iowa7055653,179,850
Maryland7070556,083,120
Michigan70705510,045,000
Minnesota7065605,700,670
Mississippi7070652,989,260
Missouri7060656,169,270
North Carolina70705510,611,900
Ohio70655511,747,700
Pennsylvania70705512,820,900
South Carolina7070555,210,100
Tennessee7070656,897,580
Virginia7070558,626,210
Washington7060607,797,100
West Virginia7055551,778,070
Wisconsin7070555,851,750
Arizona7565657,378,490
Arkansas7565653,039,000
Colorado7565655,845,530
Idaho7575701,826,160
Kansas7575652,910,360
Louisiana7570654,645,180
Maine7575601,345,790
Nebraska7570651,952,570
New Mexico7575552,096,640
North Dakota757565761,723
Oklahoma7570703,954,820
Texas75757529,472,300
Utah7565653,282,120
Wyoming757570567,025
Montana8065701,086,760
Nevada8065703,139,660
South Dakota808070903,027