When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Minimum railway curve radius - Wikipedia

    en.wikipedia.org/wiki/Minimum_railway_curve_radius

    The minimum railway curve radius is the shortest allowable design radius for the centerline of railway tracks under a particular set of conditions. It has an important bearing on construction costs and operating costs and, in combination with superelevation (difference in elevation of the two rails) in the case of train tracks , determines the ...

  3. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    The third type is reverse curve which comprises two or more simple curves that has the opposite direction of curvature (sometime known as "S" curve or serpentine curve). [ 3 ] [ 4 ] In Australia, there is a special definition for a bend (or a horizontal bend ) which is a connection between two tangent tracks at almost 180 degrees (with ...

  4. Hallade method - Wikipedia

    en.wikipedia.org/wiki/Hallade_method

    The following can be used to find the versine of a given constant radius curve: [2] The Hallade method is to use the chord to continuously measure the versine in an overlapping pattern along the curve. The versine values for the perfect circular curve would have the same number. [3]

  5. Degree of curvature - Wikipedia

    en.wikipedia.org/wiki/Degree_of_curvature

    The radius of such a curve is 5729.57795. If the chord definition is used, each 100-unit chord length will sweep 1 degree with a radius of 5729.651 units, and the chord of the whole curve will be slightly shorter than 600 units.

  6. Geometric design of roads - Wikipedia

    en.wikipedia.org/wiki/Geometric_design_of_roads

    Circular curves are defined by radius (tightness) and deflection angle (extent). The design of a horizontal curve entails the determination of a minimum radius (based on speed limit), curve length, and objects obstructing the view of the driver. [4] Using AASHTO standards, an engineer works to design a road that is safe and comfortable.

  7. Track transition curve - Wikipedia

    en.wikipedia.org/wiki/Track_transition_curve

    The design pattern for horizontal geometry is typically a sequence of straight line (i.e., a tangent) and curve (i.e. a circular arc) segments connected by transition curves. The degree of banking in railroad track is typically expressed as the difference in elevation of the two rails, commonly quantified and referred to as the superelevation .

  8. Road curve - Wikipedia

    en.wikipedia.org/wiki/Road_curve

    Road curves are irregular bends in roads to bring a gradual change of direction. Similar curves are on railways and canals. Curves provided in the horizontal plane are known as horizontal curves and are generally circular or parabolic. Curves provided in the vertical plane are known as vertical curve.

  9. Cant (road and rail) - Wikipedia

    en.wikipedia.org/wiki/Cant_(road_and_rail)

    On horizontal curves, curvature causes a centrifugal force acting outward on the outer wheel. The smaller the radius of curvature, the greater the centrifugal force. Superelevation means that the outer edge of the track is raised relative to the inner edge.