OpenCRG, create semicircle road cross-section

Hello,

I want to build a semicircle road cross-section with variable radius and coefficient of friction. The Problem is i dont really understand how to develop it in OpenCRG and could need some help. I would appreciate if someone could help me with a tipp how to start or an example file. Are there good documentations of OpenCRG?

[Walter Roberson]

This appears to refer to the open source tool http://www.opencrg.org/index.html