![]() ![]() Portions of the Idaho, Montana, Nevada, Oklahoma, South Dakota, Texas, Utah, and Wyoming road networks have 80 mph (129 km/h) posted limits. Unusual for any state east of the Mississippi River, much of Interstate 95 (I-95) in Maine north of Bangor allows up to 75 mph (121 km/h), and the same is true for up to 600 mi (966 km) of freeways in Michigan. Minor Outlying Islands have their own speed limits: 40 mph (64 km/h) in Wake Island, and 15 mph (24 km/h) in Midway Atoll. American Samoa has a maximum speed limit of 30 mph (48 km/h). Guam and the Northern Mariana Islands have speed limits of 45 mph (72 km/h). Virgin Islands have a maximum speed limit of 55 mph (89 km/h). Alaska, Connecticut, Delaware, Massachusetts, New Jersey, New York, Puerto Rico, Rhode Island, and Vermont have a maximum limit of 65 mph (105 km/h), and Hawaii has a maximum limit of 60 mph (97 km/h). The highest speed limits are generally 70 mph (113 km/h) on the West Coast and the inland eastern states, 75–80 mph (121–129 km/h) in inland western states, along with Arkansas, Louisiana, Maine, and Michigan and 65–70 mph (105–113 km/h) on the Eastern Seaboard. Some states have lower limits for trucks, some also have night and/or minimum speed limits. Speed limits are typically posted in increments of five miles per hour (8 km/h). Highway speed limits can range from an urban low of 25 mph (40 km/h) to a rural high of 85 mph (137 km/h). States have also allowed counties and municipalities to enact typically lower limits. ![]() Speed limits in the United States are set by each state or territory. Map of highest posted speed limits in the U.S. ![]()
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