Length of Spiral Curve in Transportation Posted April 4, 2011 · Report reply Why are you guys studying spiral curves? They are not on the outline syllabus for the CA-Specific Survey (which I took and passed last time, without studying spiral) nor the NCEES 8-hour Transpo depth (which I took last time and failed but believe I will pass this time). I did not see spiral questions on the last CA Survey nor the last 8 hours. My suggestion is to not study anything which isn't on the syllabus. Spirals are generally included under superelevation problems. I've come across a few spiral problems in my studying - there's a section in CERM about spirals and it's covered in Green Book (to name another souce). Check out this info, probably would make a good cheat sheet! http://www.wikiengineer.com/Transportation/SpiralCurves lady i (lady j?), I completely understand and agree with you that you'll find spiral problems, that the topic is covered in the CERM, that the topic is in the ASSHTO GDHS, etc. The point I am trying to get across to you is that the topic is not on the exam and that you should not waste precious time studying topics that you won't be tested on. My (very strong) suggestion is to adhere to the test outline/syllibus. Good luck.