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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.
60–80: 10% of speed limit within towns 20% of speed limit in toll roads. ... 20 km/h Zimbabwe: 60 kilometres per hour (37 mph) 80–120 kilometres per hour (50–75 ...
By 0–60 mph (97 km/h) (less than 3.0 s) Many elements change how fast the car can accelerate to 60 mph. [ ii ] [ iii ] Tires, elevation above sea level, weight of the driver, testing equipment, weather conditions and surface of testing track all influence these times. [ 3 ]
Federal regulators set train speed limits based on the signaling systems in use. [1] Passenger trains were limited to 59 mph (95 km/h) and freight trains to 49 mph (79 km/h) on tracks without block signals, known as "dark territory." Trains without an automatic cab signal, train stop, or train control system were not allowed to exceed 79 mph ...
Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...
The time it takes a vehicle to accelerate from 0 to 60 miles per hour (97 km/h or 27 m/s), often said as just "zero to sixty" or "nought to sixty", is a commonly used performance measure for automotive acceleration in the United States and the United Kingdom. In the rest of the world, 0 to 100 km/h (0 to 62.1 mph) is used.
Prior to 2009, a speed limit could be defined in kilometers per hour (km/h) as well as miles per hour (mph). The 2003 version of the MUTCD stated that "speed limits shown shall be in multiples of 10 km/h or 5 mph." [ 118 ] If a speed limit sign indicated km/h, the number was circumscribed and "km/h" was written below.
A Suzuki GSX-R1000 at a drag strip – a 2006 model once recorded a 0 to 60 mph time of 2.35 seconds. This is a list of street legal production motorcycles ranked by acceleration from a standing start, limited to 0 to 60 mph times of under 3.5 seconds, and 1 ⁄ 4-mile times of under 12 seconds.
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