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Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. [ 1 ] Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, expressed as kilometres per hour (km/h) or miles per hour (mph) or both.
In the United States, speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. 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). Speed limits are typically posted in increments of five miles per hour (8 km/h).
The National Maximum Speed Limit (NMSL) was a provision of the federal government of the United States 1974 Emergency Highway Energy Conservation Act that effectively prohibited speed limits higher than 55 miles per hour (89 km/h). The limit was increased to 65 miles per hour (105 km/h) in 1987. It was drafted in response to oil price spikes ...
The maximum speed limit on rural two-lane roads ranges from 50 mph (80 km/h) in parts of the northeast to 75 mph (120 km/h) in parts of Texas. On rural Interstate Highways and other freeways, the speed limit ranges from 60 mph (96 km/h) in Hawaii to 85 mph (136 km/h) in parts of Texas. All roads in the United States have a speed limit, but it ...
The Locomotive Acts in the UK set speed limits for vehicles, and later codified enforcement methods. The first Locomotive Act, passed in 1861, set a speed limit of 10 miles per hour (16 km/h) in uninhabited areas, and 5 miles per hour (8.0 km/h) within towns. This act also included the value of fines for violations of the law.
Speed limits. Maximum speed limits in the United States vary by state from 60 to 85 mph. (Washington D.C. has a maximum speed limit of 55 mph.) Speed limits are set by each state, territory, county, or municipality, on the roads within their jurisdiction. The maximum speed limit on rural two-lane roads ranges from 50 mph (80 km/h) in parts of ...
Sidewalks, curbs and traffic signals in Hagerstown, Maryland, United States Speed limits in different areas, unusually with only a "recommended" limit (130 km/h) for the Autobahn DRIP [Note 1] variable message sign guiding traffic on the Dutch A13 motorway Vehicles experiencing a breakdown or an emergency can stop in the emergency lane; these lanes may themselves present risks to traffic.
The MUTCD's W13 series of signs is for warning signs relating to advisory speeds. Speed limits in the United States are always in miles per hour. Metric advisory speed signs in kilometers per hour used to be authorized but extremely rare, usually seen near the borders with Canada and Mexico, both of which use the metric system. [5]