If I want to challenge the “virtual transition”, and propose to get rid of the virtual transition, I end up demonstrating that very often the virtual transitions are not that bad and we will use more virtual transitions, by removing the virtual transitions. But if we keep them, we will still use virtual transitions where we should not have virtual transitions…
A (bit) more accurate alternative method to calculate the equivalent radius for bending turnouts is based on the tangent defined by the crossing angle…
Where the author eloquently discusses the versine formula and the accuracy loss implied by ignoring a historically insignificant term of its equation, demonstrates an easily replicable CAD check of this inaccuracy, and reveals the EXACT versine formula.
In 1952 the Virtual Transition principle was presented to the Railway Engineering Division of ICE.
Later it became part of the Handbook No 3 Railway Curves.
Long time ago, a good friend of mine, had an interesting design experience. He designed a non-compliant alignment and, after slueing it about 1mm, he turned it into compliant. The magic is described here …
Have you ever wondered why …
(my plan was to publish this a few days ago – sorry for the delay)
A different kind of article … Antescript Several times, in the last ten years, I started to write articles with this title. The only draft I kept is so convoluted and confusing that I might even decide to publish it. I have a few answers to this question. There is one I hesitate to put…
Motto: “I don’t see the code anymore. All I see is blonde, brunette, redhead, negative, adverse.” Cypher Disclaimer: This is not a design guidance. Don’t believe everything you read online. LandXML? LandXML is a non-proprietary data standard on the Extensible Markup Language (XML) format, developed for engineering data exchange. A LandXML file can contain civil and survey…
A railway track blog 