Have you considered developing a stand alone version of your turning software? I'm always wanting to test vehicle turning at existing intersections where the only information I have is an aerial photograph. It would be great to have a small piece of software that I could import an aerial/image (or dwg) into then scale by defining the distance between two points in the image. I would then like to be able to assess the turns without needing to go to the time and expense of a survey and CAD drawing.
I have come across something called "Sweep" that does this but not very well.