cant deficiency

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  • Info The term "cant deficiency" is defined in the context of travel of a rail vehicle at constant speed on a constant radius curve. more...
  • The higher-speed trains would experience cant deficiency and the lower-speed trains would experience cant excess.
  • Cant deficiency is generally looked at with respect to ideal track geometry.
  • For a given speed, if the actual cant is less than the equilibrium cant, the amount of cant difference is called cant deficiency.
  • At such balancing speed there is zero cant deficiency and results in a frictionless banked turn.
  • If the superelevation determined for a dedicated passenger route curve on regulatory and safety bases is below it may be desirable to increase the superelevation and reduced the cant deficiency.
  • For passenger traffic superelevations and authorized speeds can be set so that trains run with as much cant deficiency as is allowed, based on safety, on relevant regulations and on passenger comfort.
  • The amount by which the actual speed exceeds the balance speed is conveniently expressed via the so-called cant deficiency, i.e., by the amount by which the superelevation would need to be increased to raise the balance speed to the speed at which the vehicles actually travel.
  • One historical approach to determining safe cant deficiency was the requirement that the projection to the plane of the track of the resultant of the centrifugal and gravitational forces acting on a vehicle fall within the middle third of the track gauge.