Speed limits in the United States are set by each state or territory. Speed limits vary primarily due to state laws, but also due to the type of road, land use, and more.
Increments of five miles per hour are used. Some states have lower limits for trucks and night. Occasionally, there are minimum speed limits.
Most speed limits are set by statute, although each state allows various agencies to set a different, usually lower, limit.
The highest speed limits are generally 75 mph (121 km/h) in western states and 70 mph (113 km/h) in eastern states. A few states, mainly in the Northeast Megalopolis, have 65 mph (105 km/h) limits, and Hawaii only has 60 mph (97 km/h) maximum limits. A small portion of the Texas and Utah road networks have higher limits.
For thirteen years (1974–1987), federal law prohibited speed limits above 55 mph (89 km/h).
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... Johnson has a reputation as a speed trap ... During most days the police will have one car staged to control the speed along Main Drive (East and West) or Wilkerson (North and South) ... When driving through Johnson, one should be careful to observe the posted speed limit, and wear your seat belt ...
... Speed m/s ft/s km/h mph Notes Approximate rate of continental drift 0.00000001 0.00000003 0.00000004 0.00000002 4 cm/year ... Varies depending on location Speed of a common snail 0.001 0.003 0.004 0.002 1 millimeter per second ... Sprint runners 10 32.8 22 ... Average speed over 100 meters ...
... Development of high-speed rail in some countries increases the share of railway for such longer-distance journeys ... In conventional non high-speed rail, overnight trains are common for this distance ... Discount Eurail Pass in Europe, Amtrak in the United States, and Indian Pacific in Australia are examples ...
... On August 12, 2009, Harding set a new land speed record for a vintage gas coupe with a speed of 97.177 mph driving a 1931 Ford Model A, named Lickity - Split ...
... The state of Wisconsin's speed limits are set out in statutory law but may often be modified by the maintaining government entity ... In addition to a basic speed rule, Wisconsin law specifies certain occasions where reduced speeds are required including—and not limited to the approaches and traverses ... Although there is no numeric minimum speed limit, state law prohibits the impediment of traffic by unreasonably slow speeds ...
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