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The kilometre, a unit of length, first appeared in English in 1810, [9] and the compound unit of speed "kilometers per hour" was in use in the US by 1866. [10] "Kilometres per hour" did not begin to be abbreviated in print until many years later, with several different abbreviations existing near-contemporaneously.
60 mph (97 km/h) BNSF between Spokane and Kettle Falls, Washington; and Canadian National’s Wisconsin Central line between Neenah, Wisconsin and Sault Ste. Marie, Michigan. [9] Class 4 [us 2] 60 mph (97 km/h) 80 mph (129 km/h) Chicago’s Metra; and New England Central’s entire main line. [9] Class 5 [us 3] 80 mph (129 km/h) 90 mph (145 km/h)
Kilometres per hour are on the left and miles per hour on the right.* ... By the same time, ... Decrease speed from 100 to 90 km/h (62 to 56 mph) ...
As winds hit 90 miles per hour (145 kph) and temperatures plunged, he worried the train's diesel engine would gel and the train seize. He told rescuers to jump out as quickly as possible when they ...
As of May 15, 2017, 41 states have maximum speed limits of 70 mph (113 km/h) or higher. 18 of those states have 75 miles per hour (121 km/h) speed limits or higher, while 7 states of that same portion have 80 mph (129 km/h) speed limits, with Texas even having an 85 miles per hour (137 km/h) speed limit on one of its toll roads.
The Minnesota Drive Expressway features a 60-mile-per-hour (97 km/h) speed limit, as does the Richardson Highway between Fairbanks and North Pole. Since the mid-1990s, Alaska's major highways have gradually been upgraded from 55 mph to 60 or 65 mph. However, several continue to carry the default 55 miles per hour (89 km/h) speed limit, including:
Authorities in the United States maintain various definitions of high-speed rail. The United States Department of Transportation, an entity in the executive branch, defines it as rail service with top speeds ranging from 110 to 150 miles per hour (180 to 240 km/h) or higher, [10] while the United States Code, which is the official codification of Federal statutes, defines it as rail service ...
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 ...