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.
Hawaii6060451,412,687
Alaska655555734,002
Connecticut6555553,563,077
Delaware655555982,895
Kentucky6565554,499,692
Massachusetts6565556,976,597
New Hampshire6565551,371,246
New Jersey6555558,936,574
New York65655519,440,469
Oregon6555654,301,089
Rhode Island6555551,056,161
Vermont655550628,061
Alabama7065654,908,621
California70656539,937,489
Florida70656521,992,985
Georgia70706510,736,059
Illinois70555512,659,682
Indiana7055556,745,354
Iowa7055653,179,849
Maryland7070556,083,116
Michigan70705510,045,029
Minnesota7065605,700,671
Mississippi7070652,989,260
Missouri7060656,169,270
North Carolina70705510,611,862
Ohio70655511,747,694
Pennsylvania70705512,820,878
South Carolina7070555,210,095
Tennessee7070656,897,576
Virginia7070558,626,207
Washington7060607,797,095
West Virginia7055551,778,070
Wisconsin7070555,851,754
Arizona7565657,378,494
Arkansas7565653,038,999
Colorado7565655,845,526
Idaho7575701,826,156
Kansas7575652,910,357
Louisiana7570654,645,184
Maine7575601,345,790
Nebraska7570651,952,570
New Mexico7575552,096,640
North Dakota757565761,723
Oklahoma7570703,954,821
Texas75757529,472,295
Utah7565653,282,115
Wyoming757570567,025
Montana8065701,086,759
Nevada8065703,139,658
South Dakota808070903,027