(A commented extract from BSEN 13803-1 (2010) Railway Applications – Track – Track alignment parameters – Track gauges 1435 and wider – Part 1: Plain Line) The track alignment design PARAMETERS (BSEN 13803-1 – 5.1.2) In the design process the values of the track alignment parameters are chosen to ensure a safe riding with at least…
The track geometry is governed by numbers and all the time we are using them to design and check our work. The geometry of the non-linear transition curves is also governed by important numbers, useful to know in the alignment design when these transitions are used: – Bloss – Cosine (and its close approximation: the…
(a prelude to a proper design guidance) Non-linear transitions and their use in alignment design In alignment design the transition curves are used to provide a smooth variation of the centrifugal acceleration between alignment segments of different curvature. When needed, the cant transition is applied, in direct relation with the curvature variation of the transition…
A railway track blog 