What is the best workflow for modeling turning islands to get it to look "clean" with the desired nose returns?
Is it possible to model the intersection without the island first (like it's all just pavement), then create the island as it's own corridor with an alignment wrapped around the curb face and somehow merge the 2 (clip out the pavement and replace with the island)?
HP Z400, 16GB ram, NVIDIA Quadro 4000
It's tough to do with corridors. I would just make a corridor without the island and a top surface. Make your porkchop from feature lines and make a surface. Make a 3rd surface and paste the other 2 into it.
Cansel - Autodesk Division
Can't you just add the feature lines to the corridor surface?
Civil 3D 2013 (SP1)
Dell Precision T1650
NVIDIA Quadro 2000
12 GB Ram