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  2. Oversize load - Wikipedia

    en.wikipedia.org/wiki/Oversize_load

    In the United States, an oversize load is a vehicle and/or load that is wider than 8 ft 6 in (2.59 m). Each individual state has different requirements regarding height and length (most states are 13 ft 6 in or 4.11 m tall), and a driver must purchase a permit for each state he/she will be traveling through.

  3. Loading gauge - Wikipedia

    en.wikipedia.org/wiki/Loading_gauge

    The maximum height, width, and length of general Chinese rolling stock are 4,800 mm (15 ft 9 in), 3,400 mm (11 ft 2 in) and 26 m (85 ft 4 in) respectively, with an extra out-of-gauge load allowance of height and width 5,300 by 4,450 mm (17 ft 5 in by 14 ft 7 in) with some special shape limitation, corresponding to a structure gauge of 5,500 by ...

  4. Semi-trailer truck - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer_truck

    Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...

  5. Truck classification - Wikipedia

    en.wikipedia.org/wiki/Truck_classification

    In the United States, commercial truck classification is determined based on the vehicle's gross vehicle weight rating (GVWR). The classes are numbered 1 through 8. [ 2 ] [ 3 ] Trucks are also classified more broadly by the Federal Highway Administration (FHWA), which groups classes 1 and 2 as light duty , 3 through 6 as medium duty , and 7 and ...

  6. Road train - Wikipedia

    en.wikipedia.org/wiki/Road_train

    If a vehicle had a 'V' as the second letter, its mass limits were in line with the eastern states mass limits, which were: Steer axle, 1 axle, 2 tyres: 5.40 t (5.31 long tons ; 5.95 short tons ) Steer axle, 2 axles, 2 tyres per axle: Non load sharing suspension 9.00 t (8.86 long tons; 9.92 short tons)

  7. Federal Bridge Gross Weight Formula - Wikipedia

    en.wikipedia.org/wiki/Federal_Bridge_Gross...

    Provided the truck remains on the NN, in all States and a truck is not subject to State size limits. [8] In a similar fashion, the Federal weight limits and the Federal Bridge Formula apply to the Interstate System in all States. The State truck size and weight regulations apply to the Federal Aid System routes that do not have Federal limits.

  8. Track gauge - Wikipedia

    en.wikipedia.org/wiki/Track_gauge

    The most common use of the term "track gauge" refers to the transverse distance between the inside surfaces of the two load-bearing rails of a railway track, usually measured at 12.7 millimetres (0.50 inches) to 15.9 millimetres (0.63 inches) below the top of the rail head in order to clear worn corners and allow for rail heads having sloping ...

  9. American Association of State Highway and Transportation ...

    en.wikipedia.org/wiki/American_Association_of...

    The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public ...