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  2. Minimum railway curve radius - Wikipedia

    en.wikipedia.org/wiki/Minimum_railway_curve_radius

    A curve should not become a straight all at once, but should gradually increase in radius over time (a distance of around 40–80 m (130–260 ft) for a line with a maximum speed of about 100 km/h (62 mph)). Even sharper than curves with no transition are reverse curves with no intervening straight track.

  3. Running track - Wikipedia

    en.wikipedia.org/wiki/Running_track

    The proper length of the first lane of a competitive running track is 400 m (1,312.3 ft). Some tracks are not built to this specification, instead being a legacy to imperial distances such as 440 yd (402.336 m), equivalent to a quarter of a mile.

  4. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    Track gauge or rail gauge (also known as track gage in North America [8]) is the distance between the inner sides (gauge sides) of the heads of the two load bearing rails that make up a single railway line. Each country uses different gauges for different types of trains.

  5. List of United States high school national records in track ...

    en.wikipedia.org/wiki/List_of_United_States_high...

    High School Name High School Location Meet Location Meet Name Date Ref. 100 y: 10.3 Chandra Cheeseborough: Ribault High School: Jacksonville, Florida: 1977 100 m: 10.89 (+0.9 m/s) Shawnti Jackson: South Granville High School: Creedmoor, North Carolina: Nashville, Tennessee: Music City Track Carnival June 3, 2023 [54] 11.00 (+1.5 m/s) Mia Brahe ...

  6. 55 metres hurdles - Wikipedia

    en.wikipedia.org/wiki/55_metres_hurdles

    55 metres hurdles is a distance in hurdling, usually only run in indoor competitions. This is more commonly run at the high school level. The objective is to approach the first hurdle with 7 steps, each hurdle after that needs to have 3 step intervals. 5 stepping or commonly known as stutter stepping cuts down a hurdlers momentum and cuts ...

  7. 300 metres hurdles - Wikipedia

    en.wikipedia.org/wiki/300_metres_hurdles

    The high school version uses a standard 45 meter start to the first hurdle. Thus the high school race is equivalent to beginning of a standard 400 meter hurdle race, but its placement on the track is shifted 100 meters around the track so it finishes at the common finish line on the straightaway, where the longer race would reach the same point near the end of the second turn.

  8. Hallade method - Wikipedia

    en.wikipedia.org/wiki/Hallade_method

    The Hallade method, devised by Frenchman Emile Hallade, is a method used in track geometry for surveying, designing and setting out curves in railway track. [1] It involves measuring the offset of a string line from the outside of a curve at the central point of a chord. In reality, string is too thick to provide a clear reading and breaks ...

  9. Arcadia Invitational - Wikipedia

    en.wikipedia.org/wiki/Arcadia_Invitational

    American Fork High School: American Fork: 2017 Distance medley relay: 9:57.88 Atlantic Community High School: Atlantic Community: 2001 800 m Sprint medley relay (1-1-2-4) 1:28.43 Long Beach Polytechnic High School: Long Beach Poly: 2007 1600 m Sprint medley relay (2-2-4-8) 3:26.36 Los Alamitos High School: Los Alamitos: 2016 4 × 110 m Shuttle ...