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Close up of speedometer

Speed Limit Laws

Setting speed limits has traditionally been the responsibility of states, except for the period of 1973-1994. During that time, the federal government enacted mandatory speed limit ceilings on interstate highways and similar limited access roads through a National Maximum Speed Limit.

Congress repealed the National Maximum Speed Limit in 1995. Since then, 34 states have raised speed limits to 70 mph or higher on some portion of their roadway systems.

Several states have set different speed limits for cars and trucks. Speed limits may vary depending on whether the roadway is urban or rural. Some states apply different speed limits to the same type of roadway, depending on various conditions. In some states, the nighttime and daytime speed limits are different as well. The chart below lists speed limits for both urban and rural interstates, as well as other limited access roads.

A few states' speed limits are not mandated by law. These are noted in the footnotes.

NOTE: GHSA does not compile any additional data on speed limit laws other than what is presented here. For more information, consult the appropriate State Highway Safety Office.

State Rural Interstates Urban Interstates Other Limited Access Roads
Cars
(mph)
Trucks
(mph)
Cars
(mph)
Trucks
(mph)
Cars
(mph)
Trucks
(mph)
Alabama 70 70 65 65 65 65
Alaska 1 55 55 55 55 55 55
Arizona 75 75 65 65 65 65
Arkansas 70 65 55 55 60 60
California 70 55 65 55 70 55
Colorado 75 75 65 65 65 65
Connecticut 65 65 55 55 65 65
Delaware 55 55 55 55 65 65
D.C. N/A N/A 55 55 N/A N/A
Florida 70 70 65 65 70 70
Georgia 70 70 55 55 65 65
Georgia ‘Super Speeder Law’ adds on $200 in state fees for any driver convicted of speeding at >75 on any two-lane roads or >85 on multiple lane roads anywhere in the state.
Guam Guam does not have any Interstates. The maximum speed limits for cars and trucks are: 35 in rural area; 15 in residential areas; and 15 or 25 in school zones.
Hawaii 60 60 60 60 55 55
Idaho 75; 80 on specified segments 70 75; 80 on specified segments 65 70 70
Illinois 70 70 55 55 65 55
Indiana 70 65 55 55 60 60
Iowa 70 70 55 55 65 65
Kansas 75 75 70 70 70 70
Kentucky 65 65 65 65 65 65
70 on specific segments based on an engineering and traffic investigation
Louisiana 75 75 70 70 70 70
Maine 75 75 75 75 75 75
Two limited access highways are posted at 55.
Maryland 65 65 65 65 65 65
Massachusetts 65 65 65 65 65 65
Michigan 70 60; 55 if speed limit for cars is <70 70 60; 55 if speed limit for cars is <70 70 60; 55 if speed limit for cars is <70
Minnesota 70 70 55, 60 or 65 55, 60 or 65 65 65
Mississippi 70 70 70 70 70 70
Missouri 70 70 60 60 65 65
Montana 75 65 65 65 day: 70
night: 65
day: 70
night: 65
Nebraska 75 75 65 65 65 65
Nevada 75 75 65 65 70 70
New Hampshire 65; 70 on specified segments 65; 70 on specified segments 65 65 55 55
New Jersey 65 65 55 55 65 65
New Mexico 75 75 65 65 60-70 60-70
New York 65 65 55 55 55 55
Except for certain designated highways
North Carolina 70 70 70 70 70 70
North Dakota 75 75 75 75 4-lane: 70; other: 65 4-lane: 70; other: 65
<75 on some urban Interstates
Northern Mariana Islands None None 45 25 None None
Ohio 70 70 65 65 70 70
Oklahoma 75 75 70 70 70 70
Oregon 65 55 55 55 55 55
60 in some sections; can be changed from 55 to 60 for cars.
Pennsylvania 65 65 65 65 65 65
70 on specific segments based on an engineering and traffic investigation (eff. 1/23/14)
Rhode Island 2 65 65 55 55 55 55
South Carolina 70 70 70 70 55 55
South Dakota 75 75 75 75 70 70
Tennessee 70 70 70 70 70 70
Texas 75; 80 or 85 on specified segments 75; 80 or 85 on specified segments 75 75 75 75
Utah 75; 80 on specified segments 75; 80 on specified segments 65 65 75 75
Vermont 65 65 55 55 50 50
Virgin Islands 40 40 55 55 20 20
Virginia 70 70 70 70 65 65
Washington 70 60 60 60 60 60
West Virginia 3 70 70 60 or 65 60 or 65 65 65
Wisconsin 65 65 65 65 65 65
Wyoming 75; 80 on specified segments 75; 80 on specified segments 65 65
1 Alaska’s default speed limit is 55 mph. 65 on select Interstate routes is by engineering investigation and case by case, not automatic or default.
2 Rhode Island speed limits not set by law, but by state traffic commission.
3West Virginia speed limits, in general, are not set by law, but by the Commissioner of the Division of Highways.

 

Sources: Insurance Institute for Highway Safety (IIHS) and State Highway Safety Offices.

Disclaimer: The information on this page is for general information purposes only and is not to be considered legal authority. For clarification on any law, consult the appropriate State Highway Safety Office.