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20 mph (32 km/h) some urban/residential areas and built up areas in Wales 30 mph (48 km/h) built up areas 40 mph on some roads in built up areas. 70 mph (112 km/h) (for both motorways and dual-carriageways) [fn 17] 60/70 mph (96/112 km/h) [fn 18] dependent on class (motorways) 50/60/70 mph (80/96/112 km/h), ditto (trunk dual-carriageways)
Speed limit sign in the Republic of Ireland, using "km/h.". The SI representations, classified as symbols, are "km/h", "km h −1" and "km·h −1".Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph", [3] [4] [5] "kmph" and "km/hr" [6] as English abbreviations.
Typical speed of road-race cyclist. 17: 60: 37: 5 ... speed of go-fast boat. 40: 140: 90: 1.3 ... 320 km/h or 200 mph is a parameter sometimes used in defining a ...
By 0–60 mph (97 km/h) (less than 3.0 s) [ edit ] 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 ]
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 ...
At night time and also uncommon on the East Coast, the default speed limit is 45 mph (72 km/h) outside a business or residential district. Through the CBD and residential district, the default speed limit is 25 mph (40 km/h). Through school zones within 300 feet (91 m), the default speed limit is 20 mph (32 km/h).
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.
Speed; system unit code (alternative) symbol or abbrev. notes sample default conversion combinations SI: metre per second: m/s m/s US spelling: meter per second: 1.0 m/s (3.3 ft/s) m/s ft/s (m/s foot/s) non-SI metric: kilometre per hour: km/h km/h US spelling: kilometer per hour: 1.0 km/h (0.62 mph) km/h mph; Imperial & US customary: mile per ...