no easy way out man, hopefully your superelevation xml file is set up properly which it will do most curves right. then you still have to edit it. the superelevation table is not dynamic in civil 3d. which i think they really should do some work on. especially make it so it can deal with compound spiral curve spiral, complicated geometry like that.
still, come to think about it , it's still way better than LDD superelevation. at least it can interpolate linearly when sampled at a closer interval.
Stantec
Dell Precision 5530, Prism M320PU, C3D 14/17/19