Transition Curves on Railway Roads in Terms of Feasibility

Th e work fi rst addressed the issue of accepting limit values for kinematic parameters on railway roads, demonstrating that it is appropriate to maintain the same rules for all types of transition curves. Th en, the prevailing opinion about the reason for the limited scope of application of the so-called smooth transition curves was confi rmed. Th ese curves have one major disadvantage -very small values of horizontal ordinates (and ordinates of the gradient due to cant) in the initial region, in practice oft en impossible to implement and then maintain. Th e main part of the work was devoted to the determination of a new form of transition curve, which -in contrast to the commonly used clothoid -is characterized by a gentle curvature in the area of entry into the circular arc. A clear advantage of this curve (from the implementation point of view) over the smooth transition curves of the Bloss curve was demonstrated.