New to the software (BRT experience) and I am trying to design a railway alignment with tangent-spiral-curve-spiral-curve-spiral-tangent.
I can get answers but I am unsure whether they are the right answers!
When I check the parameters for the middle spiral it reports compound = false.
Also when I look at the help screens it appears to me that the compound spiral set wants to go from a curve to infinity and back to the second curve and solutions that work don't look right, the compound spiral seems to join the first curve with a straight and then wind up to the second radius.
Any ideas?