Bureau of Transportation Statistics (BTS)
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Table 2-8: Maximum Posted Speed Limits by System: 20011

(Speed limit in miles per hour)

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State Interstate Other limited-access roads2 Other roads
Rural Urban
Alabama 70 70 65 65
Alaska 65 55 65 55
Arizona 75 55 55 55
Arkansas 70, Trucks: 65 55 60 55
California 70, Trucks: 55 65 70 55
Colorado 75 65 65 55
Connecticut 65 55 65 55
Delaware 65 55 65 55
District of Columbia NA 55 NA 25
Florida 70 65 70 65
Georgia 70 65 65 65
Hawaii 55 50 45 45
Idaho 75, Trucks: 65 65 65 65
Illinois 65, Trucks: 55 55 65 55
Indiana 65, Trucks: 60 55 55 55
Iowa 65 55 65 55
Kansas 70 70 70 65
Kentucky 65 55 55 55
Louisiana 70 55 70 65
Maine 65 55 55 55
Maryland 65 65 65 55
Massachusetts 65 65 65 55
Michigan 70, Trucks: 55 65 70 55
Minnesota 70 65 65 55
Mississippi 70 70 70 65
Missouri 70 60 70 65
Montana 75, Trucks: 65 65 Day: 70, Night: 65 Day: 70, Night: 65
Nebraska 75 65 65 60
Nevada 75 65 70 70
New Hampshire 65 65 55 55
New Jersey 65 55 65 55
New Mexico 75 55 65 55
New York 65 65 65 55
North Carolina 70 65 65 55
North Dakota 70 55 65 Day: 65, Night: 55
Ohio 65, Trucks: 55 65 55 55
Oklahoma 75 70 70 70
Oregon 65, Trucks: 55 55 55 55
Pennsylvania 65 55 65 55
Rhode Island 65 55 55 55
South Carolina 70 70 60 55
South Dakota 75 65 65 65
Tennessee 70 70 70 55
Texas 70 70 70 70
Utah 75 65 55 55
Vermont 65 55 50 50
Virginia 65 55 65 55
Washington 70, Trucks: 60 60 55 55
West Virginia 70 55 65 55
Wisconsin 65 65 65 55
Wyoming 75 60 65 65

1 Many roads, particularly urban interstates, often have a lower posted speed limit than the maximum allowable shown in this table.

2 Limited-access roads are multilaned roads with restricted access using exit and entrance ramps rather than intersections.

KEY: NA = not applicable.

NOTE: Interstates are divided into urban and rural sections based primarily on population size and population density.

SOURCE: Insurance Institute for Highway Safety, Highway Loss Data Institute, available at http://www.hwysafety.org/safety_facts/state_laws/speed_limit_laws.htm as of Oct. 1, 2001.