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…
On the shoulders of CWR giants In 1994 UIC (the International Union of Railways) and ERRI (the European Railway Research Institute) set up a committee of specialists – D202 – to develop an international standard code for laying and maintenance of continuous welded rail track. Various research institutions and national railway administrations provided a complex…
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…
I mentioned in a previous article, The Cubic Parabola – a complicated simplification, that the curvature diagram of the Cubic Parabola increases linearly up to a peak point and then drops down. Only that first section of the parabolic curve can be used as an alignment transition. The curvature diagram of the Clothoid is however…
Prologue One of the giants on whose shoulders stood proudly Isaac Newton, is the French mathematician Renatus Cartesius. He was the first to label the unknowns in equations by the letters X and Y and also he defined the annotation of powers as superscripted labels X2 . Believe it or not, that was a giant…
If we consider a circular curve of radius R2, tangent to a straight and mark the offsets O1, O2 and O3, measured perpendicular from the circle to the straight and placed at regular C/2 interval we will get something like this: The offsets O1 and O3 are the bases of a trapezoid and O2+V2 is…
A railway track blog 