There are often times where the design of a road requires the corridor to stop at an angle other than that perpendicular to the baseline (i.e. at bridge locations).
Civil 3D currently has no way to skew a corridor region, and we must either stop the region short and fill in with feature lines, or extend the region beyond the skew line, extract the feature lines and trim. In either case, this results in an untidy corridor model.
It would be ideal to have an option to create a skewed corridor region. This can be partly achieved with a custom subassembly (see second image), but this is a bit of a hack, and does not actually skew the links at the desired skew angle (only the strings)