Miles per hour

Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. It is used in the United States, United Kingdom and many Commonwealth nations, particularly in the Caribbean region.

Miles per hour
1974 MG MGB GT - Flickr - The Car Spy (14)
Automobile speedometer, indicating speed in miles per hour
General information
Unit systemImperial, United States customary units
Unit ofspeed
1 mph in ...... is equal to ...
   km/h   1.609344
   m/s   0.44704
   knot   0.868976
   ft/s   1.467


2014-08-19 11 59 11 Speed limit 65 miles per hour sign along northbound Nevada State Route 225 (Mountain City Highway) about 10.9 miles north of Nevada State Route 535 (Idaho Street) in Elko County, Nevada
65 mph speed limit sign in the United States
UK 50 mph speed limit sign
50 mph speed limit sign in the United Kingdom

Road traffic

Speed limits and road traffic speeds are given in miles per hour in the following jurisdictions (elsewhere kilometers per hour are used):

Road traffic speeds in other countries are indicated in kilometres per hour, while occasionally both systems are used. For example, in Ireland, a judge considered a speeding case by examining speeds in both kilometres per hour and miles per hour. The judge was quoted as saying the speed seemed "very excessive" at 180 km/h but did not look "as bad" at 112 mph; a reduced fine was still imposed on the speeding driver.[21]

Rail networks

Miles per hour is the unit also used in the Canadian rail system,[22] which uses km/h on roads.

Nautical and aeronautical usage

Nautical and aeronautical applications favour the knot as a common unit of speed. (One knot is one nautical mile per hour, with a nautical mile being exactly 1,852 meters or about 6,076 feet.)

Other usage

In some countries mph may be used to express the speed of delivery of a ball in sporting events such as cricket, tennis and baseball.


1 mph = 0.44704 m/s (exactly)
= 1.609344 km/h (exactly)
≈ 1.467 ft/s (approximately)
0.868976 kn
Conversions between common units of speed
m/s km/h mph knot ft/s
1 m/s = 1 3.6 2.236936 1.943844 3.280840
1 km/h = 0.277778 1 0.621371 0.539957 0.911344
1 mph = 0.44704 1.609344 1 0.868976 1.466667
1 knot = 0.514444 1.852 1.150779 1 1.687810
1 ft/s = 0.3048 1.09728 0.681818 0.592484 1

(Values in bold face are exact.)

See also


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  2. ^ "Ideas and Opinions – Marijuana – another perspective - Amandala Newspaper". Archived from the original on 18 September 2013. Retrieved 29 April 2018.
  3. ^ "Ophelia less organised but still a strong tropical storm". Dominica News Online. Archived from the original on 2014-03-01. Retrieved 2014-08-21.
  4. ^ "George Grant - TROUBLESOME FIGURES". Grenada Broadcast. 2013-07-04. Archived from the original on 2014-03-01. Retrieved 2014-08-21.
  5. ^ "Businesses Close Early Due to Passage of TS Isaac". The St. Kitts-Nevis Observer. 2012-08-22. Archived from the original on 2013-02-03. Retrieved 2014-08-21.
  6. ^ "The Voice - The national newspaper of St. Lucia since 1885". 2004-10-01. Archived from the original on 2014-03-01. Retrieved 2014-08-21.
  7. ^ Thursday, 21 August 2014 03:30:52 (AST) (2010-10-31). "St. Vincent appeals for aid as Tomas leaves 'millions and millions' in damage – I-Witness News". Archived from the original on 26 February 2014. Retrieved 2014-08-21.
  8. ^ "Gale warning issued, Apia town drowns". 2013-02-02. Archived from the original on 2014-02-27. Retrieved 2014-08-21.
  9. ^ Speed limits Archived 2015-03-22 at the Wayback Machine (UK) Department for Transport. Retrieved 4 August 2015
  10. ^ "Welcome to The BVI Beacon Online". 2005-12-01. Archived from the original on 2015-04-02. Retrieved 2014-08-21.
  11. ^ "Driver exceeded critical speed of 91 mph, jury hears :: Cayman Compass". Archived from the original on 2014-02-26. Retrieved 2014-08-21.
  12. ^ "Columns - An Islander's offerings from Essex by James Marsh". 2012-04-19. Archived from the original on 2014-10-16. Retrieved 2014-08-21.
  13. ^ "Flying Frenchman takes off in 'overgrown pushchair' | St Helena Online". 2012-10-23. Archived from the original on 2014-03-01. Retrieved 2014-08-21.
  14. ^ "Police urging motorists to slow down". 2009-07-15. Archived from the original on 2014-02-28. Retrieved 2014-08-21.
  15. ^ "Modern Living: Think Metric". Time Magazine. 9 June 1975. Archived from the original on 22 January 2011. Retrieved 15 June 2010. Meanwhile, the metricization of America is already taking place. Individual federal agencies, school systems, states and industries, as well as radio announcers, supermarkets, beverage bottlers and ballpark scoreboards, are hastening the everyday use of meters, liters and grams. ...a road sign outside Fergus Falls reads, ST. CLOUD 100 MILES OR 161 KILOMETERS. Other signs note that 55 m.p.h. equals 88 kilometers per hour.
  16. ^ "Our Traffic Problems Are Going To Get Worse". Samoa News. 2013-06-03. Archived from the original on 2013-09-14. Retrieved 2014-08-21.
  17. ^ "Maila Halom". Retrieved 2014-08-21.
  18. ^ [1] Archived March 1, 2014, at the Wayback Machine
  19. ^ Conor Foley (Staff Writer) (2011-07-06). "Cops: Teen was driving 75 mph in city rollover crash". Virgin Islands Daily News. Retrieved 2014-08-21.
  20. ^ JOY BLACKBURN (Daily News Staff) (2012-08-24). "Weather to begin clearing up today as Isaac leaves area - News". Virgin Islands Daily News. Archived from the original on 2013-09-16. Retrieved 2014-08-21.
  21. ^ "Another Metric System Fault". The New York Times. Associated Press. 1 November 2007. Archived from the original on 10 November 2012. Retrieved 1 November 2010.
  22. ^ "A. Classes of Track". Rules Respecting Track Safety. Transport Canada. 3 November 2008. Archived from the original on 2012-08-25. Archived 25 August 2012.
1936 Atlantic hurricane season

The 1936 Atlantic hurricane season officially began on June 1, 1936, and lasted until November 30, 1936. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin.

The 1936 season was fairly active, with 20 tropical cyclones including 3 tropical depressions. Seven storms became hurricanes, of which one became a major hurricane. In addition, the season was unusual in the fact that no storms moved across large portions of the Caribbean Sea. Seven storms, including three hurricanes, struck the United States. The season also set many records for the earliest date for a numbered storm, though all were surpassed by the extreme activity of the 2005 season.

1973 Daytona 500

The 1973 Daytona 500, the 15th running of the event, was won by Richard Petty on February 18, 1973, at Daytona International Raceway in Daytona Beach, Florida, USA.Four cautions slowed the race for 28 laps. A crowd of over one hundred thousand came to see a field of 38 American and two Canadians (Earl Ross and Vic Parsons). The average speed for the race was 157.205 miles per hour (252.997 km/h) while Buddy Baker achieved the pole position with a speed of 185.662 miles per hour (298.794 km/h). Bobby Isaac would finish second to Richard Petty by more than two laps.First Daytona 500 starts for Hershel McGriff, Darrell Waltrip, Ed Negre, John Utsman, Marty Robbins, and Earl Ross. Only Daytona 500 starts for Vic Parsons and Larry Smith. Last Daytona 500 starts for Jabe Thomas, Ray Elder, Ron Keselowski, Maynard Troyer, John Sears, Red Farmer, Tiny Lund, Neil Castles, Gordon Johncock, and Pete Hamilton.

1975 Philadelphia Eagles season

The 1975 Philadelphia Eagles season was the franchise’s 43rd in the National Football League. 1975 was the third season under head coach Mike McCormack, but became the Eagles’ ninth consecutive season without a winning record. The Eagles also missed the playoffs for a fifteenth consecutive season, a franchise record. Following the season, McCormack was fired and replaced for 1976 by Dick Vermeil.

1987 New York Giants season

The 1987 New York Giants season was the franchise's 63rd season in the National Football League. The Giants entered the season as the defending Super Bowl champion but failed to qualify for the playoffs. They were the sixth team in NFL history to enter a season as the defending Super Bowl champion and miss the playoffs. The Giants started the season 0–5, becoming the first defending Super Bowl champion to lose their first 5 games. Ultimately, the Giants never recovered from their 0–5 start, and fell to a 6–9 finish which placed them last in their division and out of the postseason.

2000 Seattle Seahawks season

The 2000 Seattle Seahawks season was the franchise's 25th season in the National Football League, The first of two seasons the Seahawks played at Husky Stadium while Qwest Field was being built and the second under head coach Mike Holmgren. The 2000 Seahawks' pass defense surrendered 7.63 yards-per-attempt (including quarterback sacks), one of the ten-worst totals in the history of the NFL. They failed to improve on their 9-7 record from 1999 and missed out on the playoffs since 1998.

A1086 road

The A1086 is a road in County Durham, north-east England.

The route of the A1086 starts from the A19 junction in Easington and runs to the A179 junction in Hartlepool via Peterlee, Horden, Blackhall Colliery, Blackhall Rocks, Crimdon and Hart Station. It is known locally as the Coast Road. The road is used as a route between Peterlee and Hartlepool for buses and local traffic. It is also used as an alternative route for the A19 and A179.

It is mostly a dangerous route between Horden and Blackhall Colliery and between Crimdon and Hart Station as the road runs through wooded areas with Castle Eden Dene between Horden and Blackhall Colliery and Crimdon Dene between Crimdon and Hart Station. The road has a 30 miles per hour speed limit in built-up areas and a 40 miles per hour speed limit for other areas apart from between Crimdon and Hart Station where the road has the national speed limit of 60 miles per hour, several people have died and suffered serious injuries through drivers exceeding this. During the 1990s there were signs along the road saying about the number of deaths and injuries on the A1086.

In 2013, a landslip between Blackhall and Horden closed the northbound lane of the A1086 due to heavy rainstorms. The road was on the verge of a 30-metre drop into the dene below. The northbound lane was closed until the repairs to the embankment were completed in early summer 2015 after over a year of disruption.

A152 road

The A152 is a small non-primary A-road in Lincolnshire, from Donington to Surfleet linking the A52 and the A16, two major primary routes.

Between Donington and Surfleet the road goes through three villages; Church End, Quadring, and Gosberton.

To eliminate the number of speeding motorists who use the road for an easy way to get to and from Spalding, there is a speed limit of 40 miles per hour (64 km/h), higher in some places, this is so that traffic flows easier than a 30 miles per hour (48 km/h) speed limit would allow.

Back to the Future

Back to the Future is a 1985 American science fiction film directed by Robert Zemeckis and written by Zemeckis and Bob Gale. It stars Michael J. Fox as teenager Marty McFly, who accidentally travels back in time to 1955, where he meets his future parents and becomes his mother's romantic interest. Christopher Lloyd portrays the eccentric scientist Dr. Emmett "Doc" Brown, inventor of the time-traveling DeLorean, who helps Marty repair history and return to 1985.

Zemeckis and Gale wrote the script after Gale wondered whether he would have befriended his father if they had attended school together. Film studios rejected it until the financial success of Zemeckis' Romancing the Stone. Zemeckis approached Steven Spielberg, who agreed to produce the project at Amblin Entertainment, with Universal Pictures as distributor. Fox was the first choice to play Marty, but he was busy filming his television series Family Ties, and Eric Stoltz was cast; after the filmmakers decided he was wrong for the role, a deal was struck to allow Fox to film Back to the Future without interrupting his television schedule.

Back to the Future was released on July 3, 1985 and it grossed over $381 million worldwide, becoming the highest-grossing film of 1985. It won the Hugo Award for Best Dramatic Presentation, the Saturn Award for Best Science Fiction Film, and the Academy Award for Best Sound Effects Editing. It received three Academy Award nominations, five BAFTA nominations, and four Golden Globe nominations, including Best Motion Picture (Musical or Comedy). In 2007, the Library of Congress selected it for preservation in the National Film Registry, and in June 2008 the American Film Institute's special AFI's 10 Top 10 designated it the 10th-best science fiction film. The film began a franchise including two sequels, Back to the Future Part II (1989) and Back to the Future Part III (1990), an animated series, theme park ride, and several video games.

Bumper (car)

A bumper is a structure attached to or integrated with the front and rear ends of a motor vehicle, to absorb impact in a minor collision, ideally minimizing repair costs. Stiff metal bumpers appeared on automobiles as early as 1904 that had a mainly ornamental function. Numerous developments, improvements in materials and technologies, as well as greater focus on functionality for protecting vehicle components and improving safety have changed bumpers over the years. Bumpers ideally minimize height mismatches between vehicles and protect pedestrians from injury. Regulatory measures have been enacted to reduce vehicle repair costs, and more recently impact on pedestrians.

Columbus Day Storm of 1962

The Columbus Day Storm of 1962 (also known as the Big Blow, and originally as Typhoon Freda) was a Pacific Northwest windstorm that struck the West Coast of Canada and the Pacific Northwest coast of the United States on October 12, 1962. It is considered the benchmark of extratropical wind storms. The storm ranks among the most intense to strike the region since at least 1948, likely since the January 9, 1880 "Great Gale" and snowstorm. The storm is a contender for the title of most powerful extratropical cyclone recorded in the U.S. in the 20th century; with respect to wind velocity, it is unmatched by the March 1993 "Storm of the Century" and the "1991 Halloween Nor'easter" ("The Perfect Storm"). The system brought strong winds to the Pacific Northwest and southwest Canada, and was linked to 46 fatalities in the northwest and Northern California resulting from heavy rains and mudslides.

Cyclone Dirk

Cyclone Dirk was a large and deep European windstorm that affected Western Europe from the Iberian Peninsula to Iceland from 22 December 2013.

OK Go (album)

OK Go is the debut studio album by American rock band OK Go. It was released in September 2002. The cover was created by designer Stefan Sagmeister.

The album debuted at number 107 on Billboard 200, and number one on Billboard Top Heatseekers Chart.

Pope Model L

The Pope Model L was a motorcycle produced by Pope Manufacturing Company in Westfield, Massachusetts, between 1914 and 1920.

The Model L was, at 70 miles per hour (110 km/h), the fastest motorcycle in the world when it was introduced.It was technologically advanced for its time, with features not found on other motorcycles, such as overhead valves, chain drive (from 1918) and multi-speed transmission. It was also expensive at $250, as much then as a Model T automobile. (Another source of competition were cyclecars)

PortAventura World

PortAventura World is an entertainment resort in Salou and Vila-seca, Tarragona, on the Costa Daurada in Catalonia, Spain. It was built around the PortAventura Park theme park, which attracts around 3.5 million visitors per year, making it the most visited theme park in Spain and the sixth most visited theme park in Europe. The resort includes a second theme park, Ferrari Land, since 2017 and also includes PortAventura Caribe Aquatic Park, five hotels, a convention centre and a RV park. It is the biggest resort in the south of Europe which attracts around 5 million visitors per year. It has two airports within 30 minutes of it, including Reus Airport. There is a train station for PortAventura which has connections to Barcelona, Salou and Tortosa.

Quarter Midget racing

Quarter Midget racing is a form of automobile racing. The cars are approximately one quarter (1/4) the size of a full size midget car. The adult size midget being raced during the start of quarter midget racing, used an oval track of one fifth of a mile in length. The child's quarter midget track is one quarter that length, or 1/20th mile (264 feet).

An adult size midget in the 1940s and 1980s could reach 120 miles per hour, while the single cylinder 7 cubic inch quarter midget engine could make available a speed of 30 miles per hour In a rookie class (Called novices), or one quarter the speed of the adult car. Most of the competitive classes run speeds near 45 miles per hour. Current upper class quarter midgets can exceed 45 miles per hour, but remain safe due to the limited size of the track. Quarter Midget racecars have four-wheel suspension, unlike go-karts.

The drivers are typically restricted to ages 5 to 16. Tracks are typically banked ovals one-twentieth of a mile long, and have a surface of dirt, concrete, or asphalt.

Safe harbor (law)

A safe harbor is a provision of a statute or a regulation that specifies that certain conduct will be deemed not to violate a given rule. It is usually found in connection with a vaguer, overall standard. By contrast, "unsafe harbors" describe conduct that will be deemed to violate the rule.

For example, in the context of a statute that requires drivers to "not drive recklessly," a clause specifying that "driving under 25 miles per hour will be conclusively deemed not to constitute reckless driving" is a "safe harbor." Likewise, a clause saying that "driving over 90 miles per hour will be conclusively deemed to constitute reckless driving" would be an "unsafe harbor." In this example, driving between 25 miles per hour and 90 miles per hour would fall outside of either a safe harbor or an unsafe harbor, and would thus be left to be judged according to the vague "reckless" standard.

Small craft advisory

A small craft advisory is a type of warning issued by the National Weather Service in the United States. It is issued when winds have reached, or are expected to reach within 12 hours, a speed marginally less than gale force. A Small Craft Advisory may also be issued when sea or lake ice exists that could be hazardous to small boats.The insignia that denotes a small craft advisory is one red, triangular flag (two such flags, one placed above the other, signify a gale warning).

Inland, this advisory is known as a wind advisory. A lake wind advisory is issued for winds just below this range, because unobstructed winds across the open waters of a lake are normally faster than across land.

The wind speed that triggers the advisory has changed over time. Until the late 1960s, the threshold was 32 to 38 miles per hour (or 28 to 33 knots). At some point, the lower limit was reduced to 23 miles per hour (20 knots). Today, however, most places have standardized on 25 to 38 miles per hour (22 to 33 knots), encompassing the combined ranges of forces 6 and 7 on the Beaufort scale. Winds strong enough to trigger a small craft advisory may be referred to as being advisory-force. Conversely, winds just above this intensity (39-57 miles per hour) are called gale-force, and have a separate associated warning.

Occasionally an informal lesser advisory, known as "small craft exercise caution", is issued for wind speeds lighter than those that call for a small craft advisory. Criteria for this vary in different localities; sometimes a range of 19 to 24 miles per hour (17 to 21 knots) is observed, or in some places 17 to 23 miles per hour (15 to 19 knots) may be used.

The National Weather Service does not specifically identify what constitutes a "small craft". The size of the boat is only part of what a person should consider when venturing out under such a warning. Weight, displacement and hull design are also important factors and an even more important consideration is not only the craft, but the experience of the captain.

The next step above these advisories is a gale warning, known as a high wind warning when issued for inland locations. If the winds are associated with a tropical cyclone, then the next level above a small craft or wind advisory is a tropical storm warning. Occasionally, such bulletins may also be issued for areas above a particular elevation, as wind speeds tend to increase with altitude in the mountains.

Speed limits in the United States

Speed limits in the United States are set by each state or territory. States 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). Some states have lower limits for trucks and at night, and occasionally there are minimum speed limits.

The highest speed limits are generally 70 mph (113 km/h) on the West Coast and the inland eastern states, 75–80 mph (121–129 km/h) in inland western states, along with Arkansas and Louisiana, and 65–70 mph (105–113 km/h) on the Eastern Seaboard. Alaska, Connecticut, Delaware, Massachusetts, New Jersey, New York, Puerto Rico, Rhode Island, and Vermont have a maximum limit of 65 mph (105 km/h), and Hawaii has a maximum limit of 60 mph (97 km/h). The District of Columbia and the U.S. Virgin Islands have a maximum speed limit of 55 mph (89 km/h). Guam, the Northern Mariana Islands and American Samoa have speed limits of 45 mph (72 km/h). Two territories in the U.S. Minor Outlying Islands have their own speed limits: 40 mph (64 km/h) in Wake Island, and 15 mph (24 km/h) in Midway Atoll. Unusual for any state east of the Mississippi River, much of I-95 in Maine north of Bangor allows up to 75 mph (121 km/h), and the same is true for up to 600 miles of freeways in Michigan. Portions of the Idaho, Montana, Nevada, South Dakota, Texas, Utah, and Wyoming road networks have 80 mph (129 km/h) posted limits. The highest posted speed limit in the country is 85 mph (137 km/h) and can be found only on the Texas State Highway 130.

For 13 years (January 1974–April 1987), federal law withheld Federal highway trust funds to states that had speed limits above 55 mph (89 km/h). From April 1987 to December 8, 1995, an amended federal law disincentivized speed limits above 65 mph (105 km/h).

Wind advisory

A Wind Advisory is generally issued by the National Weather Service of the United States when there are sustained winds of 31–39 miles per hour (50–63 km/h) and/or gusts of 46–57 miles per hour (74–92 km/h) over land. The product is site specific, but winds of this magnitude occurring over an area that frequently experiences such wind speeds will not trigger a wind advisory.

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