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  2. Speed limits in the United States by jurisdiction - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_in_the_United...

    25 mph (40 km/h) in urban areas. 45 mph (72 km/h) in rural areas. 65 mph (105 km/h) in freeways or expressways. 15 to 25 mph (24–40 km/h) in urban and rural school zones, when children are present. Most freeways can have speed limits up to 65 mph (105 km/h), while other expressways have speed limits up to 55 mph.

  3. Beaufort scale - Wikipedia

    en.wikipedia.org/wiki/Beaufort_scale

    34–40 knots 39–46 mph 62–74 km/h 17.2–20.7 m/s 18–25 ft 5.5–7.5 m Moderately high waves of greater length; edges of crests break into spindrift; foam is blown in well-marked streaks along the direction of the wind Twigs break off trees; generally impedes progress 9 Strong/severe gale 41–47 knots 47–54 mph 75–88 km/h

  4. Speed limits in the United States - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_in_the_United...

    15 mph (24 km/h) over limit at a travelled speed of greater than 55 mph (89 km/h) or over 80 mph (129 km/h) Prayer for judgment continued (PJC) available depending on the court and subject to their discretion, but not available for charges of exceeding a speed limit by more than 25 mph (40 km/h).

  5. Speed limits by country - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_by_country

    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]

  6. Fastest animals - Wikipedia

    en.wikipedia.org/wiki/Fastest_animals

    Tigers live in jungles, and have been recorded going anywhere from 30 mph (48 km/h) to 40 mph (64 km/h); much like the cheetah and lion, however, they only maintain this for a short burst. Hyena: 50–60 km/h (31–37 mph) [p] The hyena can run up to 60 km/h (37 mph); some attribute this performance specifically to the spotted hyena. [106]

  7. Miles per hour - Wikipedia

    en.wikipedia.org/wiki/Miles_per_hour

    Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.

  8. Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Knot_(unit)

    The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]

  9. Speed limit - Wikipedia

    en.wikipedia.org/wiki/Speed_limit

    One such example exists on the ice roads in Estonia, where it is advised to avoid driving at the speed of 25–40 km/h (16–25 mph) as the vehicle may create resonance that may in turn induce the breaking of ice. This means that two sets of speeds are allowed: under 25 km/h (16 mph) and between 40–70 km/h (25–43 mph). [68]