thanks alot!!
it's because i'm playing with a piece of Autobahn (very large radii..)- first/basic layout is finished (trial and error editing the xml and checking the result in trackEditor

), but next step is to subdivide/add segments for changes in texture, height, side width etc. As long as i don't know an algorithm to split a segment
exactly, i need to fiddle about arcs/radii to keep it aligned...