Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 524

8 Click OK.
9 On the Geometry Details page, click Curb Return Parameters.
The default parameters for the first intersection quadrant are displayed
in the Intersection Curb Return Parameters dialog box. In the drawing,
the first quadrant is highlighted, and arrows indicate the direction of
incoming and outgoing traffic.
512 | Chapter 14 Intersection and Roundabout Tutorials