Compound transition curves with different direction

Greetings to everyone and happy new year!!!

I have a question regarding an unusual case when it comes to track geometry.

The goal is to create two consecutive transition curves one after another, with opposite hands. Tools do allow it, as it seems on the first picture below.

However, geometrically speaking it does not seem to be correct. The start radius of the second transition curve should be the same as the end radius of the first transition curve (should be 50000 m and not 0/inf).

Is this a bug in the program and how one can fix a proper compound geometry involving two consecutive transition curves?

Thank you in advance and I am looking forward to your replay.

Best regards,

Filipp Zarov

Parents Reply
  • It means that there is an instantaneous radius of R50000 and inflexion point (infinite radius) to run from +50000 to -8000

    Could be done using Add Spiral or Geometry Connector. Probably more tricky with geometry connector because there are multiple solutions. So need to play with parameters and fixity. You may have to click multiple times on Compute to continue iterations if first set doesn't work. If no solution after 3/4 clicks it means that it can't converge.



    Answer Verified By: Filipp Zarov 

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