When you view the corridor using the Section Editor, you will not see the effects of any parameter modifications until the corridor has been updated.

• A. Sometimes
• B. True
• C. Never
• D. False

Answer: (D)

In the Section Editor, changes you make to corridor parameters are reflected immediately in the cross-section preview. As you adjust template parts, widths, slopes, or target alignments, Civil 3D recomputes the section display on the fly, so you can see the impact right away without first updating the corridor. The full corridor geometry in the model is updated only when you explicitly run an update, which rebuilds the corridor and associated surfaces. So the statement is not correct—you generally see the effects of parameter modifications in the Section Editor as you edit, even before performing an update.