Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 554

This action applies the specified parameters to the other approach roads
in the roundabout. At the top of the dialog box, you can use either the
Previous and Next buttons, or the drop-down list, to examine the
parameters of the other approach roads.
4 At the bottom of the dialog box, click Next.
Specify the island parameters
1 For Predefined Parameters To Import, select RG = 20.
2 Click Apply To All.
3 At the top of the Create Roundabout - Islands page, in the drop-down
list, select South To North Approach.
4 Under Splitter Island Parameters, clear the Provide Crosswalk (Length)
check box.
At the end of this exercise, you will examine the differences between the
South To North Approach road and the others.
5 At the bottom of the dialog box, click Next.
Add signs and pavement markings
1 Under Signs, in the J5 row, for Leader Length, enter 10.
The Leader Length parameter enables you to place a leader line between
the block that represents the top of the sign, and the block that represents
the sign.
2 In the A25 row, for Distance, enter 60.
The Distance parameter enables you to place some signs a specific distance
from the outer edge of the circulatory road. For this exercise, you will
place a roundabout sign 60 meters before the driver enters the circulatory
road, and a resume sign 50 meters after the driver exits the circulatory
road.
3 In the AB6 row, for Distance, enter 50.
4 Under Pavement Markings, in the Yield Line row, under Linetype, select
DASHED.
5 Under Crosswalk Markings, clear the following check boxes:
542 | Chapter 14 Intersection and Roundabout Tutorials