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  2. Interstate Highway standards - Wikipedia

    en.wikipedia.org/wiki/Interstate_Highway_standards

    Minimum lane width: The minimum lane width is 12 feet (3.7 m), identical to most US and state highways. Shoulder width: The minimum width of the left paved shoulder is 4 feet (1.2 m), and of the right paved shoulder 10 feet (3.0 m). With three or more lanes in each direction, both shoulders are to be at least 10 feet (3.0 m) wide.

  3. Speed bump - Wikipedia

    en.wikipedia.org/wiki/Speed_bump

    A speed bump is a bump in a roadway with heights typically ranging between 8 and 10 centimetres (3 and 4 in). The traverse distance of a speed bump is typically less than or near to 0.3 m (1 ft); contrasting with the wider speed humps, which typically have a traverse distance of 3.0 to 4.3 m (10 to 14 ft). [5][6] Speed bumps are used in parking ...

  4. Metrication in the United States - Wikipedia

    en.wikipedia.org/wiki/Metrication_in_the_United...

    A standard method for sizing tires combines millimeters for overall width and inches for the wheel diameter on which they fit. [116] In lighting, light bulbs use eighths of an inch for bulb diameter and full inches for fluorescent tube lengths, while the socket is always in millimeters (for example, the standard "medium Edison screw" is E26).

  5. French units of measurement - Wikipedia

    en.wikipedia.org/wiki/French_units_of_measurement

    In the end, these approaches came to nothing and France decided to "go it alone". [4] Decimal time was introduced in the decree of 5 October 1793 under which the day was divided into 10 "decimal hours", the "hour" into 100 " decimal minutes" and the "decimal minute" into 100 "decimal seconds". The "decimal hour" corresponded to 2 hr 24 min, the ...

  6. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    A standard-gauge railway is a railway with a track gauge of 1,435 mm (4 ft 81⁄2 in). The standard gauge is also called Stephenson gauge (after George Stephenson), international gauge, UIC gauge, uniform gauge, normal gauge in Europe, [1][2][3][4][5] and SGR in East Africa. It is the most widely used track gauge around the world, with about 55 ...

  7. Dimension - Wikipedia

    en.wikipedia.org/wiki/Dimension

    In mathematics. In mathematics, the dimension of an object is, roughly speaking, the number of degrees of freedom of a point that moves on this object. In other words, the dimension is the number of independent parameters or coordinates that are needed for defining the position of a point that is constrained to be on the object.

  8. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The seven SI base units. The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m, length), kilogram (kg, mass), ampere (A, electric current), kelvin (K, thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminous intensity).

  9. Intermodal container - Wikipedia

    en.wikipedia.org/wiki/Intermodal_container

    While they appear similar to the ISO-standard containers, there are several significant differences: they are considered High-Cubes based on their 9 ft 6 in (2.90 m) ISO-standard height, their 102-inch (2.6 m) width matches the maximum width of road vehicles in the region but is 6 inches (15 cm) wider than ISO-standard containers, [95] and they ...