There was a post in the Civil 3D Wishlist a while back. It was centered around making corridors easier to modify.
Click a corridor in 2011 and have a glance at the Ribbon. You’ll see a ton of stuff.
- Set targets directly, and directly from the region you picked with your mouse. No searching through the parameters tab trying to pick the correct region.
- Set section frequency.
- It’s very easy to add and remove custom sections
- The entire corridor doesn’t need to rebuild. When some edits are made, only that part of the corridor is rebuilt – faster.
- If you have offset targets, there is a setting to automatically add sections at the geometry points for those targets – perfect!
- And more…